Hogg, James
David Campbell , 1992
Buku Teks
Augustine, of Hippo, Saint, 354-430, author
Everymans Publishers, 2001
Buku Referensi
Rousseau, Jean-Jacques, 1712-1778, author
Everyman`s Library, 1992
Buku Teks
edited by H. Aram Veeser
Routledge, 1996
Buku Teks
Callaghan, Barry
General Publishing Co. Limited, 1978
Buku Teks