Moonman, Eric, author
Pan Books, 1971
Buku Teks
Zhuo, Julie, author
Penguin, 2019
Buku Teks
Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Satria Agus Nugroho, author
2016
UI - Tesis (Membership)
West, Alan, author
Prentice-Hall, 1992
Buku Teks