APA (7th ed.) Citation

Campbell, P. D. (1992). Astronomy and the Maya calendar correlation. Aegean Park Press.

Chicago Style (17th ed.) Citation

Campbell, Paul Douglas. Astronomy and the Maya Calendar Correlation. Laguna Hills, Calif.: Aegean Park Press, 1992.

MLA (8th ed.) Citation

Campbell, Paul Douglas. Astronomy and the Maya Calendar Correlation. Aegean Park Press, 1992.

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