Cita APA (7a ed.)

LARSEN-FREEMAN, D., & LONG, M. H. (1999). An introduction to second language acquisition research. Longman.

Cita Chicago Style (17a ed.)

LARSEN-FREEMAN, Diane, y Michael H. LONG. An Introduction to Second Language Acquisition Research. London: Longman, 1999.

Cita MLA (9a ed.)

LARSEN-FREEMAN, Diane, y Michael H. LONG. An Introduction to Second Language Acquisition Research. Longman, 1999.