Buffy, the vampire slayer. Season four

MLA

Whedon, Joss, et al. Buffy, the vampire slayer. Season four. [Beverly Hills, CA] : 20th Century Fox, 2003.

APA

Whedon, J., Gellar, S., Brendon, N., Hannigan, A., Head, A., Mutant Enemy Inc., Kuzui Enterprises, Sandollar Productions & Twentieth Century Fox Home Entertainment, I. (2003). Buffy, the vampire slayer. Season four. [Beverly Hills, CA] : 20th Century Fox.

Chicago

Whedon, Joss, Sarah Michelle Gellar, Nicholas Brendon, Alyson Hannigan, Anthony Head, Mutant Enemy Inc. and Kuzui Enterprises, et al. Buffy, the vampire slayer. Season four. [Beverly Hills, CA] : 20th Century Fox, 2003.