Ryman, R. (1988). Robert Ryman: The charter series, 14 January 1988 through 13 March 1988, San Francisco Museum of Modern Art. San Francisco Museum of Modern Art.
Citazione stile Chigago Style (17a edizione)Ryman, Robert. Robert Ryman: The Charter Series, 14 January 1988 Through 13 March 1988, San Francisco Museum of Modern Art. [San Francisco]: San Francisco Museum of Modern Art, 1988.
Citatione MLA (8a ed.)Ryman, Robert. Robert Ryman: The Charter Series, 14 January 1988 Through 13 March 1988, San Francisco Museum of Modern Art. San Francisco Museum of Modern Art, 1988.
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