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