APA (7th ed.) Citation

Nichols, R., Matthews, J., & Carr-Gomm, P. (1990). The book of druidry. Aquarian Press.

Chicago Style (17th ed.) Citation

Nichols, Ross, John Matthews, and Philip Carr-Gomm. The Book of Druidry. Wellingborough: Aquarian Press, 1990.

MLA (8th ed.) Citation

Nichols, Ross, et al. The Book of Druidry. Aquarian Press, 1990.

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