APA (7th ed.) Citation

Roberts, E. L. A. (1989). Tactic 2. Student's book. MacMillan Publishers Limited.

Chicago Style (17th ed.) Citation

Roberts, E L Autor. Tactic 2. Student's Book. 2-Londres,Inglaterra: MacMillan Publishers Limited, 1989.

MLA (9th ed.) Citation

Roberts, E L Autor. Tactic 2. Student's Book. MacMillan Publishers Limited, 1989.