Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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