APA (7th ed.) Citation

Pyle, E. H., & Williamson, S. G. (1961). Introducing Christianity / by E.H. Pyle and S.G. Williamson. Penguin.

Chicago Style (17th ed.) Citation

Pyle, E. H., and S. G. Williamson. Introducing Christianity / by E.H. Pyle and S.G. Williamson. Penguin, 1961.

MLA (9th ed.) Citation

Pyle, E. H., and S. G. Williamson. Introducing Christianity / by E.H. Pyle and S.G. Williamson. Penguin, 1961.

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