APA-čujuhus (7. p.)
Olsen, W. S. (2013). Prairie sky: A pilot's reflections on flying and the grace of altitude. University of Missouri.
Chicago-čujuhus (17. p.)
Olsen, W. Scott. Prairie Sky: A Pilot's Reflections on Flying and the Grace of Altitude. Columbia, Mo.: University of Missouri, 2013.
MLA-čujuhus (9. p.)
Olsen, W. Scott. Prairie Sky: A Pilot's Reflections on Flying and the Grace of Altitude. University of Missouri, 2013.
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