APA (7th ed.) Citation

Humphreys, H. W., Sigurdsson, G., & Owen, H. J. (1970). Model test results of circular, square, and rectangular forms of drop-inlet entrance to closed-conduit spillways. [State Water Survey Division].

Chicago Style (17th ed.) Citation

Humphreys, Harold W., Gunnar Sigurdsson, and H. James Owen. Model Test Results of Circular, Square, and Rectangular Forms of Drop-inlet Entrance to Closed-conduit Spillways. [Urbana]: [State Water Survey Division], 1970.

MLA (9th ed.) Citation

Humphreys, Harold W., et al. Model Test Results of Circular, Square, and Rectangular Forms of Drop-inlet Entrance to Closed-conduit Spillways. [State Water Survey Division], 1970.