Gilbert, J. (1975). The world's worst aircraft. M & J Hobbs in association with Michael Joseph.
Chicago-viite (17. p.)Gilbert, James. The World's Worst Aircraft. Walton-on-Thames [Eng.]: M & J Hobbs in association with Michael Joseph, 1975.
MLA-viite (8. p.)Gilbert, James. The World's Worst Aircraft. M & J Hobbs in association with Michael Joseph, 1975.
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