Cita APA (7a ed.)

Krombein, K. V., Townes, H. K., & Muesebeck, C. F. W. (1951). HYMENOPTERA of America North of Mexico: Synoptic catalog. United States Government Printing Office.

Cita Chicago Style (17a ed.)

Krombein, Karl V., Henry K. Townes, y Carl Frederick William Muesebeck. HYMENOPTERA of America North of Mexico: Synoptic Catalog. Washington, DC: United States Government Printing Office, 1951.

Cita MLA (8a ed.)

Krombein, Karl V., et al. HYMENOPTERA of America North of Mexico: Synoptic Catalog. United States Government Printing Office, 1951.