Armstrong, R. (1991). 1991 Biennial exhibition: Richard Armstrong [et al.]. Whitney Museum of American Art; W.W. Norton.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रArmstrong, Richard. 1991 Biennial Exhibition: Richard Armstrong [et Al.]. New York; New York ; London: Whitney Museum of American Art; W.W. Norton, 1991.
एमएलए (8वां संस्करण) प्रशस्ति पत्रArmstrong, Richard. 1991 Biennial Exhibition: Richard Armstrong [et Al.]. Whitney Museum of American Art; W.W. Norton, 1991.
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