Penggayaan APA
Science year 1992. (1991).
Chicago:
World Book Inc..
Chicago Style
Science year 1992.
.
Chicago:
World Book Inc.,
1991.
Text.
MLA Style
Science year 1992.
.
Chicago:
World Book Inc.,
1991.
Text.
Turabian Style
Science year 1992.
Chicago:
World Book Inc.,
1991.
Print.