APA (7th ed.) Zitazioa

Alexander, L. G. (1976). Developing skills: An integrated course for intermediate students. Longman.

Chicago Style (17th ed.) Zitazioa

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Londres: Longman, 1976.

MLA (9th ed.) Zitazioa

Alexander, Louis George. Developing Skills: An Integrated Course for Intermediate Students. Longman, 1976.