APA (7th ed.) Citation

Koelle, H. H. (2001). Lunar outpost options revisited. ILR.

Chicago Style (17th ed.) Citation

Koelle, Heinz Hermann. Lunar Outpost Options Revisited. Berlin: ILR, 2001.

MLA (9th ed.) Citation

Koelle, Heinz Hermann. Lunar Outpost Options Revisited. ILR, 2001.

Warning: These citations may not always be 100% accurate.