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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Schruender, Michael, Joseph A. Bean, و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Schruender, 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.