APA (7th ed.) Citation

Harpur, P. (1986). The serpent's circle. Warner Books.

Chicago Style (17th ed.) Citation

Harpur, Patrick. The Serpent's Circle. New York: Warner Books, 1986.

MLA (9th ed.) Citation

Harpur, Patrick. The Serpent's Circle. Warner Books, 1986.

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