APA aipamena

KatyPerry. (2009). MTV UNPLUGGED. [s. n.].

Chicago Style aipamena

KatyPerry. MTV UNPLUGGED. [s. n.], 2009.

MLA aipamena

KatyPerry. MTV UNPLUGGED. [s. n.], 2009.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.