Gaya APA
Lets Write English. (1988).
:
American Book Company.
Gaya Chicago
Lets Write English.
.
:
American Book Company,
1988.
.
Gaya MLA
Lets Write English.
.
:
American Book Company,
1988.
.
Gaya Turabian
Lets Write English.
:
American Book Company,
1988.
.