Gaya APA
Pardede, Marulak. ().
(No. No. 2. Vol. Juni-1994).
:
Science.
Gaya Chicago
Pardede, Marulak.
.
No. No. 2. Vol. Juni-1994
:
Science,
.
Index Artikel.
Gaya MLA
Pardede, Marulak.
.
No. No. 2. Vol. Juni-1994
:
Science,
.
Index Artikel.
Gaya Turabian
Pardede, Marulak.
.
No. No. 2. Vol. Juni-1994
:
Science,
.
Index Artikel.