APA

Barber S. a., Meslsted S. W., Cain J. C. & Werner L. (1964). Hunger signs in crops a symposium. New York: David Mckay.

Chicago

Barber S a, Meslsted S W, Cain John C and Werner L.nelson. 1964. Hunger signs in crops a symposium. New York: David Mckay.

Harvard

Barber S. a., Meslsted S. W., Cain J. C. and Werner L. (1964). Hunger signs in crops a symposium. New York: David Mckay.

MLA

Barber S a, Meslsted S W, Cain John C and Werner L.nelson. Hunger signs in crops a symposium. New York: David Mckay. 1964.