APA (7e ed.) Bronvermelding
ebrary, Inc, Greenberg, J. S., & Hertzfeld, H. (1992). Space economics. American Institute of Aeronautics and Astronautics.
Chicago (17e ed.) Bronvermelding
ebrary, Inc, Joel S. Greenberg, en Henry Hertzfeld. Space Economics. Washington, D.C.: American Institute of Aeronautics and Astronautics, 1992.
MLA (9e ed.) Bronvermelding
ebrary, Inc, et al. Space Economics. American Institute of Aeronautics and Astronautics, 1992.
Let op: Deze citaties zijn niet altijd 100% accuraat.