Cita APA (7th ed.)

Abigan, E. R. J., Benusa, A., & Avila, C. (1987). Focus: The Philippine Constitution of 1986. Edmundo R. Abigan, Jr.

Cita Chicago (17th ed.)

Abigan, Edmundo R. Jr, Alan Benusa, i Cynthia Avila. Focus: The Philippine Constitution of 1986. [Manila?]: Edmundo R. Abigan, Jr, 1987.

Cita MLA (9th ed.)

Abigan, Edmundo R. Jr, et al. Focus: The Philippine Constitution of 1986. Edmundo R. Abigan, Jr, 1987.