Gaya APA
Encyclopedia International (Indeks)
(Jilid 20). (1975).
Canada:
Grolier Grolier.
Gaya Chicago
Encyclopedia International (Indeks)
(Jilid 20).
.
Canada:
Grolier Grolier,
1975.
Text.
Gaya MLA
Encyclopedia International (Indeks)
(Jilid 20).
.
Canada:
Grolier Grolier,
1975.
Text.
Gaya Turabian
Encyclopedia International (Indeks)
(Jilid 20).
Canada:
Grolier Grolier,
1975.
Print.