APA-ийн эшлэл(7 дахь хэвлэлт)

McKenna, J. A., & Allen, N. (2010). Skycrane: Igor Sikorsky's last vision. American Institute of Aeronautics and Astronautics.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

McKenna, John A., ба Ned Allen. Skycrane: Igor Sikorsky's Last Vision. Reston, Va.: American Institute of Aeronautics and Astronautics, 2010.

MLA -ийн эшлэл (9 дэх хэвлэлт)

McKenna, John A., ба Ned Allen. Skycrane: Igor Sikorsky's Last Vision. American Institute of Aeronautics and Astronautics, 2010.