APA Style
Okun, Barbara F.. ().
The McGraw-Hill encyclopedia of space .
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Chicago Style
Okun, Barbara F..
The McGraw-Hill encyclopedia of space.
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,
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MLA Style
Okun, Barbara F..
The McGraw-Hill encyclopedia of space.
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,
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.
Turabian Style
Okun, Barbara F..
The McGraw-Hill encyclopedia of space.
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,
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.