APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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