Cita APA (7th ed.)

Köhnen, R. (1991). Victor Vasarely. Künstler.

Cita Chicago (17th ed.)

Köhnen, Ralph. "Victor Vasarely." Künstler 1991.

Cita MLA (8th ed.)

Köhnen, Ralph. "Victor Vasarely." Künstler, 1991.