APA-referens (7:e uppl.)

Langfeld, G. Greman art in the Netherlands before and after World War II: Gregor Langfeld. Avant-Garde and criticism.(2007).

Chicago-referens (17:e uppl.)

Langfeld, Gregor. "Greman Art in the Netherlands Before and After World War II: Gregor Langfeld." Avant-Garde and Criticism.(2007) .

MLA-referens (8:e uppl.)

Langfeld, Gregor. "Greman Art in the Netherlands Before and After World War II: Gregor Langfeld." Avant-Garde and Criticism.(2007), .

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.