Kuspit, D. B. (1994). Karel Appel Sculpture: A Catalogue Raisonne / By Donald Kuspit. Abrams.
Citazione stile Chigago Style (17a edizione)Kuspit, Donald B. Karel Appel Sculpture: A Catalogue Raisonne / By Donald Kuspit. New York: Abrams, 1994.
Citatione MLA (8a ed.)Kuspit, Donald B. Karel Appel Sculpture: A Catalogue Raisonne / By Donald Kuspit. Abrams, 1994.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.