Gaya APA
Siahaya, W. (2013).
Manajemen pengadaan = Procurement management ABG = Academic Business Government (Cet ke 2).
Bandung:
Alfabeta.
Gaya MLA
Siahaya, Willem.
"Manajemen pengadaan = Procurement management ABG = Academic Business Government".
Cet ke 2
Bandung:
Alfabeta,
2013.
Text.