Cita APA

Sprague, H. B. (1964). Hunger signs in crops a symposium (3a. ed.). New York: McKay.

Citación estilo Chicago

Sprague, Howard B. Hunger Signs in Crops a Symposium. 3a. ed. New York: McKay, 1964.

Cita MLA

Sprague, Howard B. Hunger Signs in Crops a Symposium. 3a. ed. New York: McKay, 1964.