Cita APA (7th ed.)

Singles, K. (2013). Alternate history: Playing with contingency and necessity. De Gruyter.

Cita Chicago (17th ed.)

Singles, Kathleen. Alternate History: Playing with Contingency and Necessity. Berlin ; Boston: De Gruyter, 2013.

Cita MLA (9th ed.)

Singles, Kathleen. Alternate History: Playing with Contingency and Necessity. De Gruyter, 2013.