APA (7 वां संस्करण) प्रशस्ति पत्र
Noel, T. J., & Norman, C. M. (2000). A Pikes Peak partnership: The Penroses and the Tutts (1st pbk. ed.). University Press of Colorado.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Noel, Thomas J., और Cathleen M. Norman. A Pikes Peak Partnership: The Penroses and the Tutts. 1st pbk. ed. Boulder: University Press of Colorado, 2000.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Noel, Thomas J., और Cathleen M. Norman. A Pikes Peak Partnership: The Penroses and the Tutts. 1st pbk. ed. University Press of Colorado, 2000.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.