Não informado. (2004). Helicopter and vto world. Air Age Publications.
Style de citation Chicago (17e éd.)Não informado. Helicopter and Vto World. London: Air Age Publications, 2004.
Style de citation MLA (8e éd.)Não informado. Helicopter and Vto World. Air Age Publications, 2004.
Attention : ces citations peuvent ne pas être correctes à 100%.