Rodee, Carlton Clymer, author
McGraw-Hill, 1983
Buku Teks
Islam, Syed Serajul, author
Thomson, 2005
Buku Teks
Somit, Albert
Dryden Press, 1974
Buku Teks
Sharma, R.P., author
Sterling Publishers Private, 1984
Buku Teks
Joad, C.E.M., author
Clarendon Press, 1959
Buku Teks