Cita APA (7th ed.)

Vahrson, V., & Kröger, M. (2012). Enigma: Olav Christopher Jenssen. Kerber.

Cita Chicago (17th ed.)

Vahrson, Viola, i Michael Kröger. Enigma: Olav Christopher Jenssen. Bielefeld [u.a.]: Kerber, 2012.

Cita MLA (8th ed.)

Vahrson, Viola, i Michael Kröger. Enigma: Olav Christopher Jenssen. Kerber, 2012.