APA (7th ed.) Zitazioa

Case, D., & Milne, J. (1982). Developing writing skills in english: Students' book. Heinemann Educational Books.

Chicago Style (17th ed.) Zitazioa

Case, Dough, eta John Milne. Developing Writing Skills in English: Students' Book. Londres: Heinemann Educational Books, 1982.

MLA (9th ed.) Zitazioa

Case, Dough, eta John Milne. Developing Writing Skills in English: Students' Book. Heinemann Educational Books, 1982.