APA Style
DK online science encyclopedia. (2004).
China:
DK.
Chicago Style
DK online science encyclopedia.
.
China:
DK,
2004.
Textbook.
MLA Style
DK online science encyclopedia.
.
China:
DK,
2004.
Textbook.
Turabian Style
DK online science encyclopedia.
China:
DK,
2004.
Textbook.