Burke, C. (2019). Foursome: Alfred Stieglitz, Georgia O'Keeffe, Paul Strand, Rebecca Salsbury (First edition.). Alfred A. Knopf.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBurke, Carolyn. Foursome: Alfred Stieglitz, Georgia O'Keeffe, Paul Strand, Rebecca Salsbury. First edition. New York: Alfred A. Knopf, 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBurke, Carolyn. Foursome: Alfred Stieglitz, Georgia O'Keeffe, Paul Strand, Rebecca Salsbury. First edition. Alfred A. Knopf, 2019.
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