Thomas, Rollin G., author
Prentice-Hall, 1959
Buku Teks
Lee, Sheng-Yi, author
Singapore University Press, 1974
Buku Teks
Patinkin, Don
Harper & Row, Publishers, 1972
Buku Teks
Halm, George N., author
Blakiston, 1948
Buku Teks
Holden, J. Milnes, author
Sir Isaac Pitman & Sons, 1960
Buku Teks