APA Style
Grolier Academic Encyclopedia: W-X-Y-Z.-vol.20.-. (1983).
U.S.A.:
Grolier International.
Chicago Style
Grolier Academic Encyclopedia: W-X-Y-Z.-vol.20.-.
Vol.20.
U.S.A.:
Grolier International,
1983.
Text.
MLA Style
Grolier Academic Encyclopedia: W-X-Y-Z.-vol.20.-.
Vol.20.
U.S.A.:
Grolier International,
1983.
Text.
Turabian Style
Grolier Academic Encyclopedia: W-X-Y-Z.-vol.20.-.
U.S.A.:
Grolier International,
1983.
Print.