Cita APA (7a ed.)

Schiffrin, R. S. (1970). English in action: A course for spanish speaking commercial students. Longman.

Cita Chicago Style (17a ed.)

Schiffrin, R. S. English in Action: A Course for Spanish Speaking Commercial Students. Gran Bretaña: Longman, 1970.

Cita MLA (9a ed.)

Schiffrin, R. S. English in Action: A Course for Spanish Speaking Commercial Students. Longman, 1970.