Citação norma APA

(1969). Steps to spoken english: A graded course for spanish-speaking students. Longman.

Citação norma Chicago

Steps to Spoken English: A Graded Course for Spanish-speaking Students. London: Longman, 1969.

Citação norma MLA

Steps to Spoken English: A Graded Course for Spanish-speaking Students. Longman, 1969.

Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.