Mathews, John Mabry
Appleton-Century Company, 1938
Buku Teks
John, Robert St
Time Incorporated, 1962
Buku Teks
Sparrow, John, 1906-
Published for the British Council and the National Book League by Longmans, Green & Co, 1992
Buku Teks
Silverberg, Robert
Doubleday & Company, Inc., 1972
Buku Teks
Maddux, John L.
World Bank, 1981
Buku Teks