Cita APA (7a ed.)
Peele, W. T., Cook, D. W., & Grosvenor, G. M. The North Central States. National Geographic Society.
Cita estilo Chicago (17a ed.)
Peele, William T., David W. Cook, y Gilbert M. Grosvenor. The North Central States. Washington, EUA: National Geographic Society.
Cita MLA (9a ed.)
Peele, William T., et al. The North Central States. National Geographic Society.
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