APA-viite (7. p.)
ebrary, Inc. (1997). Mars sample return: Issues and recommendations. National Academy Press.
Chicago-viite (17. p.)
ebrary, Inc. Mars Sample Return: Issues and Recommendations. Washington, D.C.: National Academy Press, 1997.
MLA-viite (9. p.)
ebrary, Inc. Mars Sample Return: Issues and Recommendations. National Academy Press, 1997.
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