APA-referens (7:e uppl.)
Clayton, J. P. (1980). The concept of correlation: Paul Tillich and the possibility of a mediating theology. W. de Gruyter.
Chicago-referens (17:e uppl.)
Clayton, John Powell. The Concept of Correlation: Paul Tillich and the Possibility of a Mediating Theology. Berlin ; New York: W. de Gruyter, 1980.
MLA-referens (9:e uppl.)
Clayton, John Powell. The Concept of Correlation: Paul Tillich and the Possibility of a Mediating Theology. W. de Gruyter, 1980.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.