Ahuja, B. N., author
Surjeet Publications, 1990
Buku Teks
Shabrina Tasya, author
2018
UI - Makalah dan Kertas Kerja
Merritt, Davis, author
[American Management Association;, ], 2005
eBooks
Richardson, John E.
Palgrave Macmillan, 2007
Buku Teks
Eck, Diana L., author
Pustaka Sinar Harapan , 2005
Buku Teks