APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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