Engel, J. A. (2007). Cold War at 30,000 feet: The Anglo-American fight for aviation supremacy. Harvard University Press.
Chicago-čujuhus (17. p.)Engel, Jeffrey A. Cold War at 30,000 Feet: The Anglo-American Fight for Aviation Supremacy. Cambridge, Mass.: Harvard University Press, 2007.
MLA-čujuhus (9. p.)Engel, Jeffrey A. Cold War at 30,000 Feet: The Anglo-American Fight for Aviation Supremacy. Harvard University Press, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.