Megrah, Maurice, author
Sweet and Maxwell, 1972
Buku Teks
Short, Raymond W., author
Henry Holt and Company, 1954
Buku Teks
Gabriel, Ralph Henry, 1890-1987, author
D. Appleton-Century, 1942
Buku Teks
Moughtin, Cliff, author
Butterworth-Heinemann, 1999
Buku Teks
Barrie, JM
Gronongen: JB Wolters, 1950
Buku Teks