APA

Crothers E. J., Suppes P., . (1967). Experiments in second-language learning. New York: Academic Press.

Chicago

Crothers Edward J, Suppes Patrick, . 1967. Experiments in second-language learning. New York: Academic Press.

Harvard

Crothers E. J., Suppes P., . (1967). Experiments in second-language learning. New York: Academic Press.

MLA

Crothers Edward J, Suppes Patrick, . Experiments in second-language learning. New York: Academic Press. 1967.