Cita APA (7th ed.)

Vasquez, E. E., & Africa, L. T. (1977). Manual i mathemantics of investment. Textbook Development Committee, De La Salle Univ.

Cita Chicago (17th ed.)

Vasquez, Eleanita E., i Leonida T. Africa. Manual I Mathemantics of Investment. Manila: Textbook Development Committee, De La Salle Univ, 1977.

Cita MLA (9th ed.)

Vasquez, Eleanita E., i Leonida T. Africa. Manual I Mathemantics of Investment. Textbook Development Committee, De La Salle Univ, 1977.