Cita APA

Politzer, R. L. 1., & Politzer, R. L. 1. (1970). Foreign language learning: A linguistic introduction. Englewood Cliffs, N.J.: Prentice Hall.

Citación estilo Chicago

Politzer, Robert Louis 1921-, y Robert Louis 1921- Politzer. Foreign Language Learning: A Linguistic Introduction. Englewood Cliffs, N.J.: Prentice Hall, 1970.

Cita MLA

Politzer, Robert Louis 1921-, y Robert Louis 1921- Politzer. Foreign Language Learning: A Linguistic Introduction. Englewood Cliffs, N.J.: Prentice Hall, 1970.