Gaya APA
Siahaya, W. (2016).
MANAJEMEN PENGADAAN: PROCUREMENT MANAGEMENT, Academic Business Goverment (Cet. 3).
Bogor:
In Media.
Gaya MLA
Siahaya, Willem.
"MANAJEMEN PENGADAAN: PROCUREMENT MANAGEMENT, Academic Business Goverment".
Cet. 3
Bogor:
In Media,
2016.
Buku E.MANAJEMEN.