Cita APA (7a ed.)

Selway, M. (1968). Steps to spoken English: A graded course for Spanish-speaking students (Rev. ed.).

Cita Chicago Style (17a ed.)

Selway, Martina. Steps to Spoken English: A Graded Course for Spanish-speaking Students. Rev. ed. London, 1968.

Cita MLA (9a ed.)

Selway, Martina. Steps to Spoken English: A Graded Course for Spanish-speaking Students. Rev. ed. 1968.