APA Style
WAHYUDI,NALOM SIAHAAN. (1975).
BUSINESS LETTERS FOR ALL .
jakarta:
PUSTAKA ILMU.
Chicago Style
WAHYUDI,NALOM SIAHAAN.
BUSINESS LETTERS FOR ALL.
jakarta:
PUSTAKA ILMU,
1975.
Text.
MLA Style
WAHYUDI,NALOM SIAHAAN.
BUSINESS LETTERS FOR ALL.
jakarta:
PUSTAKA ILMU,
1975.
Text.
Turabian Style
WAHYUDI,NALOM SIAHAAN.
BUSINESS LETTERS FOR ALL.
jakarta:
PUSTAKA ILMU,
1975.
Print.