Tohutoro APA (7th ed.)
Olsen, W. S. (2008). Hard air: Adventures from the edge of flying. University of Nebraska Press.
Tohutoru Kātū Chicago (17th ed.)
Olsen, W. Scott. Hard Air: Adventures from the Edge of Flying. Lincoln: University of Nebraska Press, 2008.
Tohutoro MLA (9th ed.)
Olsen, W. Scott. Hard Air: Adventures from the Edge of Flying. University of Nebraska Press, 2008.
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