Dorward, Alan
Britsh Council, 1951
Buku Teks
editor, Robert E. Egner; penerjemah, Rani Rahmanillah
Sadasiva, 2003
Buku Teks
Fritz, Charles A.
Routledge & Kegan Paul, 1952
Buku Teks
Makin, Gideon
Routledge, 2000
Buku Teks
Russell, Bertrand, 1872-1970, author
Avon Book Divition, 1930
Buku Teks