Cita APA (7a ed.)

Abercrombie, D. (1963). Problems and Principles in Language Study (2nd. ed.). Longmans.

Cita Chicago Style (17a ed.)

Abercrombie, David. Problems and Principles in Language Study. 2nd. ed. London: Longmans, 1963.

Cita MLA (9a ed.)

Abercrombie, David. Problems and Principles in Language Study. 2nd. ed. Longmans, 1963.