Gaya APA
Daub, W, S, S, /, G, H.
(1981).
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(
3)
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Toronto-USA:
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Gaya MLA
Daub, Willam, S., Seese, /, Guido, H..
"STUDENT GUIDE BASIC CHEMISTRY".
3
Toronto-USA:
Prentice-Hall,
1981.
Text.