Etrog, S. (1969). Sorel Etrog: Recent sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Felix Landau Gallery.
Chicago-referens (17:e uppl.)Etrog, Sorel. Sorel Etrog: Recent Sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Los Angeles: Felix Landau Gallery, 1969.
MLA-referens (8:e uppl.)Etrog, Sorel. Sorel Etrog: Recent Sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Felix Landau Gallery, 1969.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.