Lichtenstein, R. (1981). Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein. Artforum.
Lua i Stíl Chicago (17ú heag.)Lichtenstein, Roy. "Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein." Artforum 1981.
Lua MLA (8ú heag.)Lichtenstein, Roy. "Study for "Yellow Apple" and "Yellow Apple", By Roy Lichtenstein." Artforum, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.