Moscow, Henry
American Heritage Publishing Co, 1960
Buku Teks
Loon, Henrik Willem van
Dodd Nead, 1962
Buku Teks
Doubleday & Company, INC, 1966
Buku Teks
Rice, Howard C.
Princeton University Press, 1976
Buku Referensi
Channing, Edward
Harper & Row, 1968
Buku Teks