Yes!

MLA

Pollet, Frank, and Frow Steeman. Yes!. Brugge: Die Keure, 2008.

APA

Pollet, F., & Steeman, F. (2008). Yes!. Brugge: Die Keure.

Chicago

Pollet, Frank, and Frow Steeman. Yes!. Brugge: Die Keure, 2008.