APA-čujuhus (7. p.)
Frissen, V., & Beijer, S. (2015). Playful identities: The ludification of digital media cultures. Amsterdam University Press.
Chicago-čujuhus (17. p.)
Frissen, Valerie, juo Suzan Beijer. Playful Identities: The Ludification of Digital Media Cultures. Amsterdam, [Netherlands]: Amsterdam University Press, 2015.
MLA-čujuhus (9. p.)
Frissen, Valerie, juo Suzan Beijer. Playful Identities: The Ludification of Digital Media Cultures. Amsterdam University Press, 2015.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.