Cita APA (7a ed.)

Van der Colff, M. (2010). One is never alone with a rubber duck: Douglas Adams's absurd fictional universe. Cambridge Scholars.

Cita Chicago Style (17a 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 (9a ed.)

Van der Colff, Marilette. One Is Never Alone with a Rubber Duck: Douglas Adams's Absurd Fictional Universe. Cambridge Scholars, 2010.