Cita APA (7th ed.)

Hoefer, H. J. (1991). Insight guides: Philippines. APA Pub.

Cita Chicago (17th ed.)

Hoefer, Hans J. Insight Guides: Philippines. Singapore: APA Pub, 1991.

Cita MLA (9th ed.)

Hoefer, Hans J. Insight Guides: Philippines. APA Pub, 1991.