Cita APA

Sumberg, J. E. 1. (1990). Protecting natural regeneration in agricultural fields. New York, New York: CARE for the Earth.

Citación estilo Chicago

Sumberg, James Enos 1952-. Protecting Natural Regeneration in Agricultural Fields. New York, New York: CARE for the Earth, 1990.

Cita MLA

Sumberg, James Enos 1952-. Protecting Natural Regeneration in Agricultural Fields. New York, New York: CARE for the Earth, 1990.