Lichtenstein, R. (1981). Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein. Artforum.
Chicago-viite (17. p.)Lichtenstein, Roy. "Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein." Artforum 1981.
MLA-viite (8. p.)Lichtenstein, Roy. "Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein." Artforum, 1981.
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