Παραπομπή APA

(1980). Energy to the 21st century [proceedings]. American Institute of Aeronautics and Astronautics.

Παραπομπή Chicago Style

Energy to the 21st Century [proceedings]. New York: American Institute of Aeronautics and Astronautics, 1980.

Παραπομπή MLA

Energy to the 21st Century [proceedings]. American Institute of Aeronautics and Astronautics, 1980.