Siegel, K. (2001). Robert Morris: Katy Siegel looks back at the 1962 studio visit by gallerist Richard Bellamy. Artforum.
Chicago Style (17. basım) AtıfSiegel, Katy. "Robert Morris: Katy Siegel Looks Back at the 1962 Studio Visit by Gallerist Richard Bellamy." Artforum 2001.
MLA (8th ed.) AtıfSiegel, Katy. "Robert Morris: Katy Siegel Looks Back at the 1962 Studio Visit by Gallerist Richard Bellamy." Artforum, 2001.
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