APA (7th ed.) Zitazioa

Heyworth, F. (1982). Intermediate language skills reading. Hodder and Stoughton.

Chicago Style (17th ed.) Zitazioa

Heyworth, Frank. Intermediate Language Skills Reading. Londres: Hodder and Stoughton, 1982.

MLA (9th ed.) Zitazioa

Heyworth, Frank. Intermediate Language Skills Reading. Hodder and Stoughton, 1982.