Cita APA (7a ed.)

British Council. (1968). Steps to spoken english: Teacher´s book two (4a ed.). Longman.

Cita Chicago Style (17a ed.)

British Council. Steps to Spoken English: Teacher´s Book Two. 4a ed. Great Britain: Longman, 1968.

Cita MLA (9a ed.)

British Council. Steps to Spoken English: Teacher´s Book Two. 4a ed. Longman, 1968.