R. Crumb sketchbook : volume 4: late 1966 to mid '67.

MLA

R. Crumb Sketchbook : Volume 4: Late 1966 to Mid '67. Seattle: Fantagraphics books, 1994.

APA

(1994). R. Crumb sketchbook : volume 4: late 1966 to mid '67. Seattle: Fantagraphics books.

Chicago

R. Crumb Sketchbook: Volume 4: Late 1966 to Mid '67. Seattle: Fantagraphics books, 1994.