Gaya APA

Allen, W, S. (1974). Living english structure: a practice book for foreign students / W. Stannard Allen (Cet.5). : Longman.

Gaya MLA

Allen, W., Stannard. "Living english structure: a practice book for foreign students / W. Stannard Allen". Cet.5 : Longman, 1974. Tadris Biologi.