APA (7th ed.) Citation

Heyerdahl, T. (1971). The Ra expeditions. Doubleday.

Chicago Style (17th ed.) Citation

Heyerdahl, Thor. The Ra Expeditions. Garden City, N.Y.: Doubleday, 1971.

MLA (8th ed.) Citation

Heyerdahl, Thor. The Ra Expeditions. Doubleday, 1971.

Warning: These citations may not always be 100% accurate.