Reading

The ‘classic’ texts for our position(s) are:

Garfinkel, Harold. 1967. Studies in Ethnomethodology. Englewood Cliffs, NJ: Prentice-Hall.
Sacks, Harvey. 1992. Lectures on Conversation. Oxford: Blackwell.

Two later papers are essential:

Garfinkel, Harold, and Harvey Sacks. 1970. ‘On Formal Structures of Practical Actions’. In Theoretical Sociology: Perspectives and Developments, edited by John C. McKinney and Edward A. Tiryakian, 337–66. New York: Appleton-Century-Crofts. [Reprinted in the Garfinkel (1986) collection below.]
Sacks, Harvey, Emanuel A. Schegloff, and Gail Jefferson. 1974. ‘A Simplest Systematics for the Organization of Turn-Taking for Conversation’. Language 50 (4): 696–735. [Corrected version reprinted in the Schenkein (1978) collection below.]

In addition there are a number of important collections:

Douglas, Jack D., ed. 1970. Understanding Everyday Life: Toward the Reconstruction of Sociological Knowledge. Chicago: Aldine.
Sudnow, David, ed. 1972. Studies in Social Interaction. New York: Free Press.
Turner, Roy, ed. 1974. Ethnomethodology: Selected Readings. Harmondsworth: Penguin.
Schenkein, Jim, ed. 1978. Studies in the Organization of Conversational Interaction. New York: Academic Press.
Psathas, George, ed. 1979. Everyday Language: Studies in Ethnomethodology. New York: Irvington.
Atkinson, J. Maxwell, and John Heritage, eds. 1984. Structures of Social Action: Studies in Conversation Analysis. Cambridge: Cambridge University Press.
Garfinkel, Harold, ed. 1986. Ethnomethodological Studies of Work. London: Routledge.
Button, Graham, and John R. E. Lee, eds. 1987. Talk and Social Organisation. Clevedon: Multilingual Matters.
Helm, David T., W. Timothy Anderson, Albert Jay Meehan, and Anne Warfield Rawls, eds. 1989. The Interactional Order: New Directions in the Study of Social Order. New York: Irvington.
Button, Graham, ed. 1991. Ethnomethodology and the Human Sciences. Cambridge: Cambridge University Press.
Watson, Graham, and Robert M. Seiler, eds. 1992. Text in Context: Contributions to Ethnomethodology. Newbury Park, CA: Sage.
Lerner, Gene H., ed. 2004. Conversation Analysis: Studies from the First Generation. Amsterdam: John Benjamins.

The key texts for how ethnomethodology and conversation analysis have developed are:

Garfinkel, Harold. 2002. Ethnomethodology’s Program: Working Out Durkheim’s Aphorism. Lanham, MD: Rowman & Littlefield.
Schegloff, Emanuel A. 2007. Sequence Organization in Interaction: A Primer in Conversation Analysis. Cambridge: Cambridge University Press.