Lovelock, Christopher H.
McGraw-Hill, 1985
Buku Teks
Al-Ashri, Abd al-Salam
Kairo Dar al-Ma'arif [t.th.]
Buku Teks
Abd-al-Qadir Kamil, Abd-al-Aziz
Unesco, 1970
Buku Teks
Abd Allah, Muhammad Abd al-Hakim
Maktabat Misr, 1957
Buku Teks
Kurtz, David L.
The Dryden Press , 1981
Buku Teks