Steel, Danielle
Kekuatan mahadahsyat = Irresistible forces
Gramedia Pustaka Utama, 2001
 Buku Teks
Tindall, William York
Forces in modern British literature 1885-1946
Books for Libraries Press, 1947
 Buku Teks
Matondang, Saiful Anwar
Gender, hibriditas, dan perbedayaan budaya : The Root of All Evil & Parallel Forces sebagai teks multibudaya Australia
1997
 UI - Tesis Membership
Brown, Christy
Wild grow the lilies : an antic novel
Secker & Warburg, 1976
 Buku Teks
Long, David
The falling boy : a novel / David Long
Scribner, 1997
 Buku Teks