Cita APA

O'Neill, C. 1. (1983). Amazing mysteries of the world. Washington, D.C.: National Geographic Society.

Citación estilo Chicago

O'Neill, Catherine 1950-. Amazing Mysteries of the World. Washington, D.C.: National Geographic Society, 1983.

Cita MLA

O'Neill, Catherine 1950-. Amazing Mysteries of the World. Washington, D.C.: National Geographic Society, 1983.