Hilliard, J. (1979). Triaden: John Hilliard. Kunstforum.
Cita Chicago (17th ed.)Hilliard, John. "Triaden: John Hilliard." Kunstforum 1979.
Cita MLA (8th ed.)Hilliard, John. "Triaden: John Hilliard." Kunstforum, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.