Samsubar Saleh, author
Andi, 1986
Buku Teks
Mann, Prem S
New York John Wiley & Sons 1995,
Buku Teks
Colqohoun, D.
Clarendon Press , 1971
Buku Teks
Guiraud, Pierre
Utrecht Spectrum 1954
Buku Teks
Pieper, Ursula, author
Tubingen Gunter Narr Verlag 1979
Buku Teks