APA (7th ed.) Citation

Irwin, R. (2011). Robert Irwin: Four Proposals. Artforum.

Chicago Style (17th ed.) Citation

Irwin, Robert. "Robert Irwin: Four Proposals." Artforum 2011.

MLA (8th ed.) Citation

Irwin, Robert. "Robert Irwin: Four Proposals." Artforum, 2011.

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