Cita APA (7th ed.)

Goodrich, L., & Mandel, P. F. (1968). John Heliker. Whitney Museum of American Art by F.A. Praeger.

Cita Chicago (17th ed.)

Goodrich, Lloyd, i Patricia Fitzgerald Mandel. John Heliker. New York: Whitney Museum of American Art by F.A. Praeger, 1968.

Cita MLA (9th ed.)

Goodrich, Lloyd, i Patricia Fitzgerald Mandel. John Heliker. Whitney Museum of American Art by F.A. Praeger, 1968.