Cita APA (7a ed.)

Floyd, G. (1970). Steps to spoken english: A graded course for spanish-speaking students. Teacher's book four. Longmans.

Cita Chicago Style (17a ed.)

Floyd, Gareth. Steps to Spoken English: A Graded Course for Spanish-speaking Students. Teacher's Book Four. London: Longmans, 1970.

Cita MLA (8a ed.)

Floyd, Gareth. Steps to Spoken English: A Graded Course for Spanish-speaking Students. Teacher's Book Four. Longmans, 1970.