Gaya APA

Jenkins, D, R. et al (2005). American X-Vehicles: An Inventory-X-1 to X-50 (E-Book) . : NASA History Office.

Gaya MLA

Jenkins, Dennis, R.. et al. "American X-Vehicles: An Inventory-X-1 to X-50 (E-Book)". : NASA History Office, 2005. Text.