Gaya APA
Silaen, Sofar. (2018).
Riset Operasi .
Bogor:
In Media.
Gaya Chicago
Silaen, Sofar.
Riset Operasi.
Bogor:
In Media,
2018.
Buku.
Gaya MLA
Silaen, Sofar.
Riset Operasi.
Bogor:
In Media,
2018.
Buku.
Gaya Turabian
Silaen, Sofar.
Riset Operasi.
Bogor:
In Media,
2018.
Buku.