APA (7th ed.) Citation

Hallett, P. H. (1961). What is a catholic? Collier books.

Chicago Style (17th ed.) Citation

Hallett, Paul H. What Is a Catholic? New York: Collier books, 1961.

MLA (9th ed.) Citation

Hallett, Paul H. What Is a Catholic? Collier books, 1961.

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