Johnson-Freese, J. (2009). Heavenly ambitions: America's quest to dominate space. University of Pennsylvania Press.
Chicago-viite (17. p.)Johnson-Freese, Joan. Heavenly Ambitions: America's Quest to Dominate Space. Philadelphia: University of Pennsylvania Press, 2009.
MLA-viite (9. p.)Johnson-Freese, Joan. Heavenly Ambitions: America's Quest to Dominate Space. University of Pennsylvania Press, 2009.
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