APA-čujuhus (7. p.)
ebrary, Inc. (2004). Stepping-stones to the future of space exploration: A workshop report. National Academies Press.
Chicago-čujuhus (17. p.)
ebrary, Inc. Stepping-stones to the Future of Space Exploration: A Workshop Report. Washington, D.C.: National Academies Press, 2004.
MLA-čujuhus (9. p.)
ebrary, Inc. Stepping-stones to the Future of Space Exploration: A Workshop Report. National Academies Press, 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.