Harman, Jeanne Perkins, author
Appleton-Century-Crofts, 1961
Buku Teks
Yongki Salmeno
Puspa Swara, 1994
Buku Teks
Bangs, Richard
Siera Club Books, 1988
Buku Teks
Price, Willard
Willam Heinemann , 1944
Buku Teks
Husain, Mahdi
Oriental Institute, 1953
Buku Teks