APA (7th ed.) Citation

Abis, L. V. (1980). Utilization of solar energy in the Philippines. Philippine Engineering Journal.

Chicago Style (17th ed.) Citation

Abis, Leopoldo V. "Utilization of Solar Energy in the Philippines." Philippine Engineering Journal 1980.

MLA (9th ed.) Citation

Abis, Leopoldo V. "Utilization of Solar Energy in the Philippines." Philippine Engineering Journal, 1980.

Warning: These citations may not always be 100% accurate.