Cita APA (7a ed.)

Dulay, H., Burt, M., & Krashen, S. (1982). Language two. Oxford University Press.

Cita Chicago Style (17a ed.)

Dulay, Heidi, Marina Burt, y Stephen Krashen. Language Two. New York: Oxford University Press, 1982.

Cita MLA (9a ed.)

Dulay, Heidi, et al. Language Two. Oxford University Press, 1982.