APA Style
GEM users guide version 3.0. (1988).
California:
Digital Research.
Chicago Style
GEM users guide version 3.0.
.
California:
Digital Research,
1988.
Text.
MLA Style
GEM users guide version 3.0.
.
California:
Digital Research,
1988.
Text.
Turabian Style
GEM users guide version 3.0.
California:
Digital Research,
1988.
Print.