Bealle, P. J. (1990). Obstacles and advocates: Factors influencing the introduction of modern art from Germany to New York City, 1912-33: major promoters and exhibitions.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBealle, Penny Joy. Obstacles and Advocates: Factors Influencing the Introduction of Modern Art from Germany to New York City, 1912-33: Major Promoters and Exhibitions. Ithaca, N.Y, 1990.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBealle, Penny Joy. Obstacles and Advocates: Factors Influencing the Introduction of Modern Art from Germany to New York City, 1912-33: Major Promoters and Exhibitions. 1990.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.