Etrog, S. (1969). Sorel Etrog: Recent sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Felix Landau Gallery.
Chicago-viite (17. p.)Etrog, Sorel. Sorel Etrog: Recent Sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Los Angeles: Felix Landau Gallery, 1969.
MLA-viite (8. p.)Etrog, Sorel. Sorel Etrog: Recent Sculpture : January 6-February 1, 1969 / Felix Landau Gallery. Felix Landau Gallery, 1969.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.