Citazione Stile APA (7a Edizione)

British Council. (1970). Steps to spoken english: A graded course for spanish-speaking students (1a. ed.). Longman.

Citazione stile Chigago Style (17a edizione)

British Council. Steps to Spoken English: A Graded Course for Spanish-speaking Students. 1a. ed. Londres: Longman, 1970.

Citatione MLA (9a ed.)

British Council. Steps to Spoken English: A Graded Course for Spanish-speaking Students. 1a. ed. Longman, 1970.