Não informado. (2004). World helicopter and vertical flight. Air Age Publications.
Chicagoスタイル(17版)引用形式Não informado. World Helicopter and Vertical Flight. London: Air Age Publications, 2004.
MLA(8版)引用形式Não informado. World Helicopter and Vertical Flight. Air Age Publications, 2004.
警告: この引用は必ずしも正確ではありません.