Sacks, H., Schlegoff, I., & Jefferson, G. (1974). A simplest systematics for the organization of turn-taking in conversation. Language, 50, 696-735. doi:10.2307/412243. [FULLTEXT]
A History of Psycholinguistics
Bibliography for Levelt (2013)

Sacks, H., Schlegoff, I., & Jefferson, G. (1974). A simplest systematics for the organization of turn-taking in conversation. Language, 50, 696-735. doi:10.2307/412243. [FULLTEXT]