Cita APA (7th ed.)
Melham, T., Grehan, F., & Hall, T. John Muir's Wild America. National Geographic Society, Special Publications Division.
Cita Chicago (17th ed.)
Melham, Tom, Farrell Grehan, i Tom Hall. John Muir's Wild America. Washington, EUA: National Geographic Society, Special Publications Division.
Cita MLA (9th ed.)
Melham, Tom, et al. John Muir's Wild America. National Geographic Society, Special Publications Division.
Atenció: Aquestes cites poden no estar 100% correctes.