APA (7th ed.) Citation

Owen, D. T., Bidwell, E. J., Roper, J. C., Doull, A. J., Little, H. M., & Richardson, J. A. (2010). Some Essentials of Religion. Project Gutenberg.

Chicago Style (17th ed.) Citation

Owen, D. T., E. J. Bidwell, J. C. Roper, A. J. Doull, H. M. Little, and J. A. Richardson. Some Essentials of Religion. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Owen, D. T., et al. Some Essentials of Religion. Project Gutenberg, 2010.

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