Gaya APA
Harefa, Andrias, Sirait, P. Hasudungan, Leo, Wahyudi S.. ().
50 Years and Beyond .
Hoboken, NJ:
.
Gaya Chicago
Harefa, Andrias, Sirait, P. Hasudungan, Leo, Wahyudi S..
50 Years and Beyond.
Hoboken, NJ:
,
.
Text.
Gaya MLA
Harefa, Andrias, Sirait, P. Hasudungan, Leo, Wahyudi S..
50 Years and Beyond.
Hoboken, NJ:
,
.
Text.
Gaya Turabian
Harefa, Andrias, Sirait, P. Hasudungan, Leo, Wahyudi S..
50 Years and Beyond.
Hoboken, NJ:
,
.
Print.