Singles, K. (2013). Alternate history: Playing with contingency and necessity. De Gruyter.
Chicago-referens (17:e uppl.)Singles, Kathleen. Alternate History: Playing with Contingency and Necessity. Berlin ; Boston: De Gruyter, 2013.
MLA-referens (9:e uppl.)Singles, Kathleen. Alternate History: Playing with Contingency and Necessity. De Gruyter, 2013.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.