Gaya APA
Writing english as a second language. (1971).
tempaterbit:
penerbit.
Gaya Chicago
Writing english as a second language.
Edisi.
tempaterbit:
penerbit,
1971.
Text.
Gaya MLA
Writing english as a second language.
Edisi.
tempaterbit:
penerbit,
1971.
Text.
Gaya Turabian
Writing english as a second language.
tempaterbit:
penerbit,
1971.
Print.