APA

Guerry E. M., . (1961). The social doctrine of the Catholic Church. New York: Alba House.

Chicago

Guerry Emile Maurice, . 1961. The social doctrine of the Catholic Church. New York: Alba House.

Harvard

Guerry E. M., . (1961). The social doctrine of the Catholic Church. New York: Alba House.

MLA

Guerry Emile Maurice, . The social doctrine of the Catholic Church. New York: Alba House. 1961.