Παραπομπή APA

Duggins, P. (2007). Final countdown: NASA and the end of space shuttle program. University Press of Florida.

Παραπομπή Chicago Style

Duggins, Pat. Final Countdown: NASA and the End of Space Shuttle Program. Gainesville: University Press of Florida, 2007.

Παραπομπή MLA

Duggins, Pat. Final Countdown: NASA and the End of Space Shuttle Program. University Press of Florida, 2007.