APA (7th ed.) Zitazioa

Hutchinson, T. (1987). English for specific purposes: a learning centred: Approach. U. Pr.

Chicago Style (17th ed.) Zitazioa

Hutchinson, Tom. English for Specific Purposes: A Learning Centred: Approach. Cambridge: U. Pr, 1987.

MLA (9th ed.) Zitazioa

Hutchinson, Tom. English for Specific Purposes: A Learning Centred: Approach. U. Pr, 1987.