APA (7th ed.) Citation

Heyerdahl, T. (1971). The Ra expeditions. George Allen & Unwin.

Chicago Style (17th ed.) Citation

Heyerdahl, Thor. The Ra Expeditions. London: George Allen & Unwin, 1971.

MLA (9th ed.) Citation

Heyerdahl, Thor. The Ra Expeditions. George Allen & Unwin, 1971.

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