Cita APA

Fisher, R., & Blair, J. P. (1984). Our threatened inheritance: Natural treasures of the United States. Washington, D.C.: National Geographic Society.

Citación estilo Chicago

Fisher, Ron, y James P. Blair. Our Threatened Inheritance: Natural Treasures of the United States. Washington, D.C.: National Geographic Society, 1984.

Cita MLA

Fisher, Ron, y James P. Blair. Our Threatened Inheritance: Natural Treasures of the United States. Washington, D.C.: National Geographic Society, 1984.