Tohutoro APA (7th ed.)

Watkinson, J. (2004). Art of the helicopter. Elsevier Butterworth-Heinemann.

Tohutoru Kātū Chicago (17th ed.)

Watkinson, John. Art of the Helicopter. Oxford ; Burlington, MA: Elsevier Butterworth-Heinemann, 2004.

Tohutoro MLA (9th ed.)

Watkinson, John. Art of the Helicopter. Elsevier Butterworth-Heinemann, 2004.