APA-referens (7:e uppl.)

Allen, W. (1959). Living English Structure- Key to the exercise (14th.). Orient Longman.

Chicago-referens (17:e uppl.)

Allen, W. Living English Structure- Key to the Exercise. 14th. Hyderabad: Orient Longman, 1959.

MLA-referens (9:e uppl.)

Allen, W. Living English Structure- Key to the Exercise. 14th. Orient Longman, 1959.