Gaya APA
Encyclopedia International. (1976).
Philippines:
Grolier Incerporated.
Gaya Chicago
Encyclopedia International.
.
Philippines:
Grolier Incerporated,
1976.
.
Gaya MLA
Encyclopedia International.
.
Philippines:
Grolier Incerporated,
1976.
.
Gaya Turabian
Encyclopedia International.
Philippines:
Grolier Incerporated,
1976.
.