APA-viite (7. p.)
Noel, T. J., & Norman, C. M. (2000). A Pikes Peak partnership: The Penroses and the Tutts (1st pbk. ed.). University Press of Colorado.
Chicago-viite (17. p.)
Noel, Thomas J., ja Cathleen M. Norman. A Pikes Peak Partnership: The Penroses and the Tutts. 1st pbk. ed. Boulder: University Press of Colorado, 2000.
MLA-viite (9. p.)
Noel, Thomas J., ja Cathleen M. Norman. A Pikes Peak Partnership: The Penroses and the Tutts. 1st pbk. ed. University Press of Colorado, 2000.
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