Cita APA (7a ed.)
Gerrard, M. National Greographic Grecia. RBA : National Geographic Society.
Cita estilo Chicago (17a ed.)
Gerrard, Mike. National Greographic Grecia. España: RBA : National Geographic Society.
Cita MLA (9a ed.)
Gerrard, Mike. National Greographic Grecia. RBA : National Geographic Society.
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