Cita APA (7a ed.)

Ehrlich, P. R., & Ehrlich, A. H. (1991). Healing the planet: Strategies for resolving the environmental crisis. Addison-Wesley.

Cita Chicago Style (17a ed.)

Ehrlich, Paul R., y Anne H. Ehrlich. Healing the Planet: Strategies for Resolving the Environmental Crisis. Reading, Mass.: Addison-Wesley, 1991.

Cita MLA (8a ed.)

Ehrlich, Paul R., y Anne H. Ehrlich. Healing the Planet: Strategies for Resolving the Environmental Crisis. Addison-Wesley, 1991.