Cita APA (7th ed.)

Guillermo, R., Almirante, S. G., & Sape, G. R. (1999). Philippine history and government (1999 ed.). IBON Foundation.

Cita Chicago (17th ed.)

Guillermo, Ramon, Sofia Guillermo Almirante, i Gilbert Roland Sape. Philippine History and Government. 1999 ed. Manila: IBON Foundation, 1999.

Cita MLA (9th ed.)

Guillermo, Ramon, et al. Philippine History and Government. 1999 ed. IBON Foundation, 1999.