Cita APA (7a ed.)

Butterbaugh, W. E. (1924). Principles of importing. D. Appleton and Company.

Cita Chicago Style (17a ed.)

Butterbaugh, Wayne E. Principles of Importing. New York [etc.]: D. Appleton and Company, 1924.

Cita MLA (9a ed.)

Butterbaugh, Wayne E. Principles of Importing. D. Appleton and Company, 1924.