Cita APA (7a ed.)

Burnell Held, R., & Clawson, M. (1965). Soil conservation in perspective. John Hopkins University Press.

Cita Chicago Style (17a ed.)

Burnell Held, R., y Marion Clawson. Soil Conservation in Perspective. Baltimore: John Hopkins University Press, 1965.

Cita MLA (8a ed.)

Burnell Held, R., y Marion Clawson. Soil Conservation in Perspective. John Hopkins University Press, 1965.