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.