APA (7th ed.) Citation

Trethowan, I. (1961). The basis of belief The twentieth century encyclopedia of Catholicism.

Chicago Style (17th ed.) Citation

Trethowan, Illtyd. "The Basis of Belief." The Twentieth Century Encyclopedia of Catholicism 1961.

MLA (8th ed.) Citation

Trethowan, Illtyd. "The Basis of Belief." The Twentieth Century Encyclopedia of Catholicism, 1961.

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