Gaya APA

Chapman, J, O, (. (1983). Spiritual letters. Cet. pertama 1935. . London: Sheed and Ward.

Gaya MLA

Chapman, John,, O.S.B., (1865-1933). "Spiritual letters. Cet. pertama 1935. ". London: Sheed and Ward, 1983. Buku.