Não informado. (2004). Knowledge: An illustrated magazine of science. [s.n.].
Chicago-viite (17. p.)Não informado. Knowledge: An Illustrated Magazine of Science. [s.l.]: [s.n.], 2004.
MLA-viite (8. p.)Não informado. Knowledge: An Illustrated Magazine of Science. [s.n.], 2004.
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