APA (7th ed.) Citation

Castro, P. P. M. (1983). River models: Physical vs. Mathematical. Philippine Engineering Journal.

Chicago Style (17th ed.) Citation

Castro, Peter Paul M. "River Models: Physical Vs. Mathematical." Philippine Engineering Journal 1983.

MLA (9th ed.) Citation

Castro, Peter Paul M. "River Models: Physical Vs. Mathematical." Philippine Engineering Journal, 1983.