Horn, Paul V.
Prentice-Hall, 1955
Buku Teks
Zook, Paul
Southern Methodist University Press, 1959
Buku Teks
Fayerweather, John
Holt, Rinehart and Winston , 1962
Buku Teks
Stern, Siegfried
Columbia University , 1952
Buku Teks
Holt, Rinehart and Winston, 1963
Buku Teks