Cita APA (7a ed.)

O'Neill, R. [. A. (1978). Akl intermediate. Longman.

Cita Chicago Style (17a ed.)

O'Neill, Robert [Et Al.]. Akl Intermediate. New York: Longman, 1978.

Cita MLA (9a ed.)

O'Neill, Robert [Et Al.]. Akl Intermediate. Longman, 1978.