APA (7th ed.) Citation

Persson, R. (2013). Purple nigh. [Selbstverl.].

Chicago Style (17th ed.) Citation

Persson, Ragnar. Purple Nigh. [S.l.]: [Selbstverl.], 2013.

MLA (9th ed.) Citation

Persson, Ragnar. Purple Nigh. [Selbstverl.], 2013.

Warning: These citations may not always be 100% accurate.