APA

Régnier J., . (1961). What is sin?. Wesminster: Newman Press.

Chicago

Régnier J, . 1961. What is sin?. Wesminster: Newman Press.

Harvard

Régnier J., . (1961). What is sin?. Wesminster: Newman Press.

MLA

Régnier J, . What is sin?. Wesminster: Newman Press. 1961.