Gaya APA
Pedoman Kerja PT. United Sumatera Plantations Kisaran. (1991).
Kisaran:
.
Gaya Chicago
Pedoman Kerja PT. United Sumatera Plantations Kisaran.
.
Kisaran:
,
1991.
Text.
Gaya MLA
Pedoman Kerja PT. United Sumatera Plantations Kisaran.
.
Kisaran:
,
1991.
Text.
Gaya Turabian
Pedoman Kerja PT. United Sumatera Plantations Kisaran.
Kisaran:
,
1991.
Print.