APA (7th ed.) Citation

Villegas, B. M., & Abola, V. A. (1982). Economics: An introduction. Sinag-Tala Pub.

Chicago Style (17th ed.) Citation

Villegas, Bernardo M., and Victor A. Abola. Economics: An Introduction. Manila: Sinag-Tala Pub, 1982.

MLA (9th ed.) Citation

Villegas, Bernardo M., and Victor A. Abola. Economics: An Introduction. Sinag-Tala Pub, 1982.