Παραπομπή APA

Marshall, M. W. (1990). Ocean Traders: From the Portuguese discoveries to the present day. New York: Facts on File.

Παραπομπή Chicago Style

Marshall, Michael W. Ocean Traders: From the Portuguese Discoveries to the Present Day. New York: Facts on File, 1990.

Παραπομπή MLA

Marshall, Michael W. Ocean Traders: From the Portuguese Discoveries to the Present Day. New York: Facts on File, 1990.

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