Koelle, H. H. (2002). The moon challenges humans to return and discover its secrets: A road map for the acquisition of the first lunar base. ILR.
Chicago-Zitierstil (17. Ausg.)Koelle, Heinz Hermann. The Moon Challenges Humans to Return and Discover Its Secrets: A Road Map for the Acquisition of the First Lunar Base. Berlin: ILR, 2002.
MLA-Zitierstil (9. Ausg.)Koelle, Heinz Hermann. The Moon Challenges Humans to Return and Discover Its Secrets: A Road Map for the Acquisition of the First Lunar Base. ILR, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.