APA
Adam K., . (1930). The Spirit of Catholicism. New York: Macmillan Company.
Chicago
Adam Karl, . 1930. The Spirit of Catholicism. New York: Macmillan Company.
Harvard
Adam K., . (1930). The Spirit of Catholicism. New York: Macmillan Company.
MLA
Adam Karl, . The Spirit of Catholicism. New York: Macmillan Company. 1930.
