Jasper Johns, Working Proofs.

MLA

Geelhaar, Christian, E Smets, and H Vandermeulen. Jasper Johns, Working Proofs. 500 exemplaren Hasselt: Provinciaal Museum Hasselt, 1980.

APA

Geelhaar, C., Smets, E., & Vandermeulen, H. (1980). Jasper Johns, Working Proofs. 500 exemplaren Hasselt: Provinciaal Museum Hasselt.

Chicago

Geelhaar, Christian, E Smets, and H Vandermeulen. Jasper Johns, Working Proofs. 500 exemplaren Hasselt: Provinciaal Museum Hasselt, 1980.