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Dyfyniad APA
Fredriksen, J. C. (2011). The United States Air Force: A chronology. ABC-CLIO.
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Dyfyniad Arddull Chicago
Fredriksen, John C. The United States Air Force: A Chronology. Santa Barbara, Calif.: ABC-CLIO, 2011.
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Dyfyniad MLA
Fredriksen, John C. The United States Air Force: A Chronology. ABC-CLIO, 2011.
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