Cita APA (7th ed.)

Zafra, U. A. (1955). Philippine economic handbook. [s.n.].

Cita Chicago (17th ed.)

Zafra, Urbano Alviar. Philippine Economic Handbook. Washington: [s.n.], 1955.

Cita MLA (9th ed.)

Zafra, Urbano Alviar. Philippine Economic Handbook. [s.n.], 1955.