APA (7th ed.) Citation

Robertson, J. C. (2010). Sketches of Church History From A.D. 33 to the Reformation. Project Gutenberg.

Chicago Style (17th ed.) Citation

Robertson, James Craigie. Sketches of Church History From A.D. 33 to the Reformation. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Robertson, James Craigie. Sketches of Church History From A.D. 33 to the Reformation. Project Gutenberg, 2010.

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