APA-referens (7:e uppl.)
Gelber, H. G. (2004). It could have been otherwise: Contingency and necessity in Dominican theology at Oxford, 1300-1350. Brill.
Chicago-referens (17:e uppl.)
Gelber, Hester Goodenough. It Could Have Been Otherwise: Contingency and Necessity in Dominican Theology at Oxford, 1300-1350. Leiden ; Boston: Brill, 2004.
MLA-referens (9:e uppl.)
Gelber, Hester Goodenough. It Could Have Been Otherwise: Contingency and Necessity in Dominican Theology at Oxford, 1300-1350. Brill, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.