Cita APA (7a ed.)

Krashen, S. (1986). Priciples and practice in second language acquisition ([1st. ed., 4th rep.].). Pergamon press.

Cita Chicago Style (17a ed.)

Krashen, Stephen. Priciples and Practice in Second Language Acquisition. [1st. ed., 4th rep.]. Oxford [etc.]: Pergamon press, 1986.

Cita MLA (9a ed.)

Krashen, Stephen. Priciples and Practice in Second Language Acquisition. [1st. ed., 4th rep.]. Pergamon press, 1986.