Heinritz, Stuart F.
Purchasing : principles and applications
Prentice-Hall, 1961
 Buku Teks SO
Purchasing : principles and applications
Stuart F. Heinritz ... [et al.]
Prentice Hall International, 1991
 Buku Teks SO
Analisis Faktor Pre-Adoption & Post-Adoption yang Memengaruhi Continuance Usage pada Aplikasi Mobile Online Travel Agency (OTA) = Analysis of Pre-adoption & Post-Adoption Factors Affecting Continuance Usage on Mobile Online Travel Agency (OTA) Applications
[Fakultas Ilmu Komputer Universitas Indonesia;, ], 2022
 UI - Skripsi Membership
Paquette, Larry
The sourcing solution: a step-by-step guide to creating a successful purchasing program
American Management Association, 2003
 eBooks
Baily, Peter
Design of purchasing systems and records
Gover Press, 1974
 Buku Teks