Cita APA (7a ed.)
Boggs, R. S. (1956). English step by step with pictures. Latin American Institute Press.
Cita Chicago Style (17a ed.)
Boggs, Ralph Steele. English Step by Step with Pictures. New York: Latin American Institute Press, 1956.
Cita MLA (9a ed.)
Boggs, Ralph Steele. English Step by Step with Pictures. Latin American Institute Press, 1956.
Precaución: Estas citas no son 100% exactas.