Staber, M. (1974). Robert Motherwell. Kunstforum.
Cita Chicago (17th ed.)Staber, Margit. "Robert Motherwell." Kunstforum 1974.
Cita MLA (8th ed.)Staber, Margit. "Robert Motherwell." Kunstforum, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.