APA (7e ed.) Bronvermelding
Ludwig, G. H. (2011). Opening space research: Dreams, technology, and scientific discovery. American Geophysical Union.
Chicago (17e ed.) Bronvermelding
Ludwig, George H. Opening Space Research: Dreams, Technology, and Scientific Discovery. Washington, DC: American Geophysical Union, 2011.
MLA (9e ed.) Bronvermelding
Ludwig, George H. Opening Space Research: Dreams, Technology, and Scientific Discovery. American Geophysical Union, 2011.
Let op: Deze citaties zijn niet altijd 100% accuraat.