R. Crumb sketchbook : volume 7: mid 1969 to end of '70.

MLA

R. Crumb Sketchbook : Volume 7: Mid 1969 to End of '70. Seattle: Fantagraphics books, 1999.

APA

(1999). R. Crumb sketchbook : volume 7: mid 1969 to end of '70. Seattle: Fantagraphics books.

Chicago

R. Crumb Sketchbook: Volume 7: Mid 1969 to End of '70. Seattle: Fantagraphics books, 1999.