APA Style
Grolier encyclopedia of knowledge. ().
Danbury:
Grolier Incorporated.
Chicago Style
Grolier encyclopedia of knowledge.
Vols. 1 to 20.
Danbury:
Grolier Incorporated,
.
Text.
MLA Style
Grolier encyclopedia of knowledge.
Vols. 1 to 20.
Danbury:
Grolier Incorporated,
.
Text.
Turabian Style
Grolier encyclopedia of knowledge.
Danbury:
Grolier Incorporated,
.
Print.