Strong, Anna Louise
Tibetan interviews
New World Press, 1959
 Buku Teks SO
Levenson, Claude B.
Symbols of Tibetan Buddhism
Editions Assouline, 1997
 Buku Referensi
Jaschke, H. A.
A Tibetan-English dictionary
Curzon Press, 1998
 Buku Referensi
Guenther, Herbert V.
Treasures on the Tibetan Middle way
Shambhala, 1976
 Buku Teks SO
Gordon, Antoinette K.
Tibetan religious art
Columbia University Press, 1952.
 Buku Teks SO