Cita APA

Allen, W. S., & Allen, W. S. (1959). Living English structure: A practice book foreign students and Key (3. edition.). London, Sydney: Longmans, Green.

Citación estilo Chicago

Allen, William Stannard, y William Stannard Allen. Living English Structure: A Practice Book Foreign Students and Key. 3. edition. London, Sydney: Longmans, Green, 1959.

Cita MLA

Allen, William Stannard, y William Stannard Allen. Living English Structure: A Practice Book Foreign Students and Key. 3. edition. London, Sydney: Longmans, Green, 1959.