APA (7th ed.) Citation

Spence, L. (1949). The history and origins of Druidism. Barnes & Noble.

Chicago Style (17th ed.) Citation

Spence, Lewis. The History and Origins of Druidism. New York: Barnes & Noble, 1949.

MLA (9th ed.) Citation

Spence, Lewis. The History and Origins of Druidism. Barnes & Noble, 1949.