Arin Wulandari
Fakultas Teknik Universitas Indonesia, 2018
UI - Skripsi (Membership)
Lockyer, Keith
Prentice-Hall, 2005
Buku Teks
Huefner, Ronald J.
Business Expert Press, 2011
Buku Teks
Smith, Henry
Oxford University Press, 1951
Buku Teks
Packard, Philip C.
Mouton, 1972
Buku Teks