Cita APA (7a ed.)

Bell, P. L. (1921). Colombia: A Commercial and Industrial Handbook. Government Printing Office.

Cita Chicago Style (17a ed.)

Bell, P. L. Colombia: A Commercial and Industrial Handbook. Washington: Government Printing Office, 1921.

Cita MLA (9a ed.)

Bell, P. L. Colombia: A Commercial and Industrial Handbook. Government Printing Office, 1921.