Cita APA

Allen, H. (1939). Commercial arithmetic. Longmans, Green and Co.

Citación estilo Chicago

Allen, H.V. Commercial Arithmetic. London: Longmans, Green and Co, 1939.

Cita MLA

Allen, H.V. Commercial Arithmetic. Longmans, Green and Co, 1939.

Warning: These citations may not always be 100% accurate.