APA (7th ed.) Citation

Castro, P. P. River models: Physical vs. mathematical. Philippine engineering journal.

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

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