APA (7th ed.) Citation

Robertson, A. (1954). The origins of Christianity. Internat. Publishers.

Chicago Style (17th ed.) Citation

Robertson, Archibald. The Origins of Christianity. New York: Internat. Publishers, 1954.

MLA (9th ed.) Citation

Robertson, Archibald. The Origins of Christianity. Internat. Publishers, 1954.

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