APA (7th ed.) Citation

Chen, C. L., & Chow, V. T. (1971). Formulation of mathematical watershed-flow model. Proceedings of the American Society of Civil Engineers, 97, 809.

Chicago Style (17th ed.) Citation

Chen, C. L., and V. T. Chow. "Formulation of Mathematical Watershed-flow Model." Proceedings of the American Society of Civil Engineers 97 (1971): 809.

MLA (9th ed.) Citation

Chen, C. L., and V. T. Chow. "Formulation of Mathematical Watershed-flow Model." Proceedings of the American Society of Civil Engineers, vol. 97, 1971, p. 809.