Abis, L. V. (1980). Energy generation and utilization. Philippine Engineering Journal.
Cita Chicago (17th ed.)Abis, Leopoldo V. "Energy Generation and Utilization." Philippine Engineering Journal 1980.
Cita MLA (9th ed.)Abis, Leopoldo V. "Energy Generation and Utilization." Philippine Engineering Journal, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.