423221 Garrison, P. (1978). The encyclopaedia of hot air balloons. New York : Sterling.
Lua i Stíl Chicago (17ú heag.)423221 Garrison, Paul. The Encyclopaedia of Hot Air Balloons. New York : Sterling, 1978.
Lua MLA (9ú heag.)423221 Garrison, Paul. The Encyclopaedia of Hot Air Balloons. New York : Sterling, 1978.
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