Pan American World Airways, Inc. (1960). New horizons world guide: Pan Am's travel facts about 138 countries (Ninth revised edition.). Pan American World Airways.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPan American World Airways, Inc. New Horizons World Guide: Pan Am's Travel Facts About 138 Countries. Ninth revised edition. Pan American World Airways, 1960.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPan American World Airways, Inc. New Horizons World Guide: Pan Am's Travel Facts About 138 Countries. Ninth revised edition. Pan American World Airways, 1960.
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