Schruender, M., Bean, J. A., & Iremonger, R. (1997). Bears, beasts & masculine beauties: The erotic art of DaDe/Ursus / by Michael Schruender. Edited and with a foreword by Joseph W. Bean. Incorporating an interview of the artist by Rich Iremonger. Brush Creek.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchruender, Michael, Joseph A. Bean, और Rich Iremonger. Bears, Beasts & Masculine Beauties: The Erotic Art of DaDe/Ursus / by Michael Schruender. Edited and with a Foreword by Joseph W. Bean. Incorporating an Interview of the Artist by Rich Iremonger. San Francisco, Calif.: Brush Creek, 1997.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchruender, Michael, et al. Bears, Beasts & Masculine Beauties: The Erotic Art of DaDe/Ursus / by Michael Schruender. Edited and with a Foreword by Joseph W. Bean. Incorporating an Interview of the Artist by Rich Iremonger. Brush Creek, 1997.