Cita APA (7th ed.)
Van der Colff, M. (2010). One is never alone with a rubber duck: Douglas Adams's absurd fictional universe. Cambridge Scholars.
Cita Chicago (17th ed.)
Van der Colff, Marilette. One Is Never Alone with a Rubber Duck: Douglas Adams's Absurd Fictional Universe. Newcastle upon Tyne: Cambridge Scholars, 2010.
Cita MLA (9th ed.)
Van der Colff, Marilette. One Is Never Alone with a Rubber Duck: Douglas Adams's Absurd Fictional Universe. Cambridge Scholars, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.