Sheridon, Mary Dorothy
Routledge, 1983
Buku Teks
Scalise, Dagmara, author
American Management Association, 2009
eBooks
Marotz, Lynn R., author
Wadsworth and Cengage Learning, 2013
Buku Teks
I Gusti Agung Ngurah Sugitha Adnyana, author
2016
UI - Tugas Akhir
edited by Michael Lewis and Suzanne M. Miller
Plenum Press, 1990
Buku Referensi