Cita APA (7th ed.)

Parks, W. R. (1952). Soil conservation districts in action. Iowa State College Press.

Cita Chicago (17th ed.)

Parks, William Robert. Soil Conservation Districts in Action. Ames: Iowa State College Press, 1952.

Cita MLA (8th ed.)

Parks, William Robert. Soil Conservation Districts in Action. Iowa State College Press, 1952.