Cita APA (7th ed.)

Heyworth, F. (1984). Discussions: Advanced role play for EFL. Hodder and Stoughton.

Cita Chicago (17th ed.)

Heyworth, Frank. Discussions: Advanced Role Play for EFL. Londres: Hodder and Stoughton, 1984.

Cita MLA (9th ed.)

Heyworth, Frank. Discussions: Advanced Role Play for EFL. Hodder and Stoughton, 1984.