Tina Savitri, author
1990
UI - Skripsi (Membership)
P. F. Collier & Son Corporation, 1917
Buku Referensi
Mortimer, Charles E.
Publishing, 1983
Buku Teks
Vitkovich, Victor
Foreign Languages Publishing House , 1954
Buku Teks
Hamm, Harry
Doubleday & Company, Inc., 1966
Buku Teks