APA (7th ed.) Citation

Gregg, S. (2009). The modern papacy. Major conservative and libertarian thinkers.

Chicago Style (17th ed.) Citation

Gregg, Samuel. "The Modern Papacy." Major Conservative and Libertarian Thinkers 2009.

MLA (8th ed.) Citation

Gregg, Samuel. "The Modern Papacy." Major Conservative and Libertarian Thinkers, 2009.

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