APA (7e ed.) Bronvermelding

O'Brien, B. J. (1989). Pray: A mini course in spirituality. Riehle Foundation.

Chicago (17e ed.) Bronvermelding

O'Brien, Bartholomew J. Pray: A Mini Course in Spirituality. Milford, Ohio: Riehle Foundation, 1989.

MLA (8e ed.) Bronvermelding

O'Brien, Bartholomew J. Pray: A Mini Course in Spirituality. Riehle Foundation, 1989.