APA (7e ed.) Bronvermelding

Não informado. (2004). Helicopter and vto world. Air Age Publications.

Chicago (17e ed.) Bronvermelding

Não informado. Helicopter and Vto World. London: Air Age Publications, 2004.

MLA (8e ed.) Bronvermelding

Não informado. Helicopter and Vto World. Air Age Publications, 2004.

Let op: Deze citaties zijn niet altijd 100% accuraat.