Conroy, C. C. (1910). Pope Calixtus III. and Halley's comet. Los Angeles.
Chicago Style (17th ed.) CitationConroy, Charles C. Pope Calixtus III. and Halley's Comet. Los Angeles, 1910.
MLA (8th ed.) CitationConroy, Charles C. Pope Calixtus III. and Halley's Comet. Los Angeles, 1910.
Warning: These citations may not always be 100% accurate.