APA-referens (7:e uppl.)

Carreon, J. P. Q., Dicdican, R. Y., Leyva, R. G. G., & Saquing, F. D. (1991). Government Service Insurance System: Loans administration department. College of Engineering.

Chicago-referens (17:e uppl.)

Carreon, John Philip Q., Ruth Y. Dicdican, Ruby Gisela G. Leyva, och Flordeliz D. Saquing. Government Service Insurance System: Loans Administration Department. Diliman, Quezon City: College of Engineering, 1991.

MLA-referens (9:e uppl.)

Carreon, John Philip Q., et al. Government Service Insurance System: Loans Administration Department. College of Engineering, 1991.