Gaya APA
Siahaya, W. (2013).
Manajemen pengadaan procurement management ABG Academic Business Goverment (2013).
Bandung:
Alfabeta.
Gaya MLA
Siahaya, Willem.
"Manajemen pengadaan procurement management ABG Academic Business Goverment".
2013
Bandung:
Alfabeta,
2013.
Text.