Cita APA (7a ed.)

Eckholm, E. P., & Brown, L. R. (1977). Spreading deserts, the hand of man. Worldwatch Institute.

Cita Chicago Style (17a ed.)

Eckholm, Erik P., y Lester R. Brown. Spreading Deserts, the Hand of Man. Washington, DC: Worldwatch Institute, 1977.

Cita MLA (9a ed.)

Eckholm, Erik P., y Lester R. Brown. Spreading Deserts, the Hand of Man. Worldwatch Institute, 1977.