APA (7th ed.) Citation

Allen, W. S. (1992). Living English structure answer key. Longman.

Chicago Style (17th ed.) Citation

Allen, W. Stannard. Living English Structure Answer Key. Harlow, Essex: Longman, 1992.

MLA (8th ed.) Citation

Allen, W. Stannard. Living English Structure Answer Key. Longman, 1992.

Warning: These citations may not always be 100% accurate.