APA (7th ed.) Citation

Parola, R. (1971). Principle Modes of Expression in Op Art.

Chicago Style (17th ed.) Citation

Parola, Rene. Principle Modes of Expression in Op Art. 1971.

MLA (9th ed.) Citation

Parola, Rene. Principle Modes of Expression in Op Art. 1971.

Warning: These citations may not always be 100% accurate.