Iconclass : : an iconographic classification system.

MLA

Van de Waal, Henri, et al. Iconclass : an Iconographic Classification System. Amsterdam: North-Holland Publishing Company, 1981.

APA

Van de Waal, H., Couprie, L. D, Tholen, E., & Vellekoop, G. (1981). Iconclass : an iconographic classification system. Amsterdam: North-Holland Publishing Company.

Chicago

Van de Waal, Henri, Leendert D Couprie, E Tholen, and G Vellekoop. Iconclass: An Iconographic Classification System. Amsterdam: North-Holland Publishing Company, 1981.