APA

Yarnell D. L., Woodward S. M., . (1925). The flow of water in drain tile. Washington, DC: Gov. Print. Off.

Chicago

Yarnell David L, Woodward Sherman M, . 1925. The flow of water in drain tile. Washington, DC: Gov. Print. Off.

Harvard

Yarnell D. L., Woodward S. M., . (1925). The flow of water in drain tile. Washington, DC: Gov. Print. Off.

MLA

Yarnell David L, Woodward Sherman M, . The flow of water in drain tile. Washington, DC: Gov. Print. Off. 1925.