APA (7th ed.) Citation

Phelpe, J. (1955). The Prehistoric Solar Calendar.

Chicago Style (17th ed.) Citation

Phelpe, John. The Prehistoric Solar Calendar. Baltimore, Md, 1955.

MLA (8th ed.) Citation

Phelpe, John. The Prehistoric Solar Calendar. 1955.

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