Gaya APA
Grolier international encyclopedia 20. (1998).
Dambusy:
Grolier Incorporanted.
Gaya Chicago
Grolier international encyclopedia 20.
.
Dambusy:
Grolier Incorporanted,
1998.
Text.
Gaya MLA
Grolier international encyclopedia 20.
.
Dambusy:
Grolier Incorporanted,
1998.
Text.
Gaya Turabian
Grolier international encyclopedia 20.
Dambusy:
Grolier Incorporanted,
1998.
Print.