Cita APA (7a ed.)

Hough, B. O. (1921). Practical exporting: A handbook for manufacturers and merchants (7th ed.). American Exporter.

Cita Chicago Style (17a ed.)

Hough, B. Olney. Practical Exporting: A Handbook for Manufacturers and Merchants. 7th ed. New York [etc.]: American Exporter, 1921.

Cita MLA (9a ed.)

Hough, B. Olney. Practical Exporting: A Handbook for Manufacturers and Merchants. 7th ed. American Exporter, 1921.