Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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