APA Style
Incorporated, G. ().
Grolier Family Encyclopedia Volume 20 (Wor-Zyg ; Index) (Volume 20).
Connecticut:
Grolier Incorporated.
MLA Style
Incorporated, Grolier.
"Grolier Family Encyclopedia Volume 20 (Wor-Zyg ; Index)".
Volume 20
Connecticut:
Grolier Incorporated,
.
Text.