@book{Siebert, author = {Siebert, Rudolf J.}, title = {The Critical Theory of Religion: The Frankfurt School, Lanham, MD, USA (Scarecrow Press) 2001 [First reprint from Walter de Gruyter, 1985] 736 pp.}, language = {en} } @book{Siebert, author = {Siebert, Rudolf J.}, title = {Hegel and the Critical Theory of Religion, ed. by Dustin J. Byrd, Kalamazoo / Michigan (Ekpyrosis Press) 2021, 349 pp.}, editor = {Byrd, Dustin J.}, language = {en} }