APA (7th ed.) Citation

Surkan, A. J. (1973). HYDRA: Dynamic model for urban hydrologic systems. NTIS.

Chicago Style (17th ed.) Citation

Surkan, Alvin J. HYDRA: Dynamic Model for Urban Hydrologic Systems. [Springfield, Va.: NTIS, 1973.

MLA (8th ed.) Citation

Surkan, Alvin J. HYDRA: Dynamic Model for Urban Hydrologic Systems. NTIS, 1973.

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