Cita APA (7a ed.)

Abercrombie, D. (1965). 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, 1965.

Cita MLA (9a ed.)

Abercrombie, David. Problems and Principles in Language Study. 2nd ed. Longmans, 1965.