Lowry, Robert
Allen & Unwin, 1996
Buku Teks
Heilman, Madeline E., author
Richard D. Irwin, 1982
Buku Teks
Steel, Danielle, author
Gramedia Pustaka Utama, 2001
Buku Teks
Margenau, Henry, author
Pergamon Press, 1969
Buku Teks
Du Bois, Cora Alice, 1903-1991, author
University of Minesota Press, 1949
Buku Teks