Gaya APA
Edward Humphrey, dkk. (1973).
Encyclopedia Year Book 1973 (NULL).
Canada:
Grolier Inc..
Gaya Chicago
Edward Humphrey, dkk.
Encyclopedia Year Book 1973.
NULL
Canada:
Grolier Inc.,
1973.
BUKU.
Gaya MLA
Edward Humphrey, dkk.
Encyclopedia Year Book 1973.
NULL
Canada:
Grolier Inc.,
1973.
BUKU.
Gaya Turabian
Edward Humphrey, dkk.
Encyclopedia Year Book 1973.
NULL
Canada:
Grolier Inc.,
1973.
BUKU.