Lwin, May, author
Prentice-Hall, 2003
Buku Teks
Dennisa Briliany Winda Pangestika, author
2019
UI - Skripsi (Membership)
Totterdell, Anne, author
Facet, 2005
Buku Teks
Spokane, Arnold R., author
Prentice-Hall, 1991
Buku Referensi
Piotrowski, Katy, 1962-, author
JIST Works, 2009
Buku Teks