Gaya APA
English for office. (1992).
tempaterbit:
penerbit.
Gaya Chicago
English for office.
Edisi.
tempaterbit:
penerbit,
1992.
Text.
Gaya MLA
English for office.
Edisi.
tempaterbit:
penerbit,
1992.
Text.
Gaya Turabian
English for office.
tempaterbit:
penerbit,
1992.
Print.