APA (7th ed.) Citation

(1968). Steps to spoken english: A graded course for spanish-speaking. Longman.

Chicago Style (17th ed.) Citation

Steps to Spoken English: A Graded Course for Spanish-speaking. London: Longman, 1968.

MLA (9th ed.) Citation

Steps to Spoken English: A Graded Course for Spanish-speaking. Longman, 1968.