Crossman, R. C. (1983). Paul Tillich: A comprehensive bibliography and keyword index of primary and secondary writings in English. ATLA bibliography series.
Chicago-Zitierstil (17. Ausg.)Crossman, Richard C. "Paul Tillich: A Comprehensive Bibliography and Keyword Index of Primary and Secondary Writings in English." ATLA Bibliography Series 1983.
MLA-Zitierstil (8. Ausg.)Crossman, Richard C. "Paul Tillich: A Comprehensive Bibliography and Keyword Index of Primary and Secondary Writings in English." ATLA Bibliography Series, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.