Castro, P. P. M. (1983). River models: Physical vs. Mathematical. Philippine Engineering Journal.
Chicago Style (17th ed.) CitationCastro, Peter Paul M. "River Models: Physical Vs. Mathematical." Philippine Engineering Journal 1983.
MLA (9th ed.) CitationCastro, Peter Paul M. "River Models: Physical Vs. Mathematical." Philippine Engineering Journal, 1983.
Warning: These citations may not always be 100% accurate.