APA-ийн эшлэл(7 дахь хэвлэлт)

Pressel, P., & Allen, N. (2013). Meeting the challenge: The Hexagon KH-9 reconnaissance satellite. Published by American Institute of Aeronautics and Astronautics, Inc..

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Pressel, Philip, ба Ned Allen. Meeting the Challenge: The Hexagon KH-9 Reconnaissance Satellite. Reston, Virginia: Published by American Institute of Aeronautics and Astronautics, Inc., 2013.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Pressel, Philip, ба Ned Allen. Meeting the Challenge: The Hexagon KH-9 Reconnaissance Satellite. Published by American Institute of Aeronautics and Astronautics, Inc., 2013.