Bucur, B. G. (2009). Angelomorphic pneumatology: Clement of Alexandria and other early Christian witnesses. Brill.
Chicago-viite (17. p.)Bucur, Bogdan Gabriel. Angelomorphic Pneumatology: Clement of Alexandria and Other Early Christian Witnesses. Leiden ; Boston: Brill, 2009.
MLA-viite (9. p.)Bucur, Bogdan Gabriel. Angelomorphic Pneumatology: Clement of Alexandria and Other Early Christian Witnesses. Brill, 2009.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.