Cita APA (7a ed.)

Heady, E. O. (1967). Roots of the farm problem. Iowa State University Press.

Cita Chicago Style (17a ed.)

Heady, Earl O. Roots of the Farm Problem. Ames, Iowa: Iowa State University Press, 1967.

Cita MLA (9a ed.)

Heady, Earl O. Roots of the Farm Problem. Iowa State University Press, 1967.