Cita APA (7a ed.)

ALLEN, W. S. (1974). Living english structure: Key to the exercises. Longman.

Cita Chicago Style (17a ed.)

ALLEN, W. Stannard. Living English Structure: Key to the Exercises. London: Longman, 1974.

Cita MLA (9a ed.)

ALLEN, W. Stannard. Living English Structure: Key to the Exercises. Longman, 1974.