Cita APA (7a ed.)
Grosvenor, M. B., & Severy, M. Greece and Rome: Builders of Our World. National Geographic Society.
Cita estilo Chicago (17a ed.)
Grosvenor, Melville Bell, y Merle Severy. Greece and Rome: Builders of Our World. Washington, EUA: National Geographic Society.
Cita MLA (9a ed.)
Grosvenor, Melville Bell, y Merle Severy. Greece and Rome: Builders of Our World. National Geographic Society.
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