APA (7th ed.) Citation
Kajanová, Y., Duffell, L., & Duffell, G. (2014). On the history of rock music. PL Academic Research.
Chicago Style (17th ed.) Citation
Kajanová, Yvetta, Lea Duffell, and Geoffrey Duffell. On the History of Rock Music. Frankfurt am Main, Germany: PL Academic Research, 2014.
MLA (9th ed.) Citation
Kajanová, Yvetta, et al. On the History of Rock Music. PL Academic Research, 2014.
Warning: These citations may not always be 100% accurate.