Isaacson, Walter, author
Collins Design, 2008
Buku Referensi
Fisk, Peter, author
Elex Media Komputindo, 2006
Buku Teks
Farrukh, OA
Beirut Al-Kashaf-Press 1952
Buku Teks
edited by Sylvan Barnet, Morton Berman, William Burton
New American Library, 1960
Buku Teks
Horizon Press, 1957
Buku Teks