Lerner, Abba P. (Abba Ptachya), 1903-1982, author
Macmillan, 1958
Buku Teks
Doblstein, Andrew W., author
Prentice-Hall, 1980
Buku Teks
Gordon, Margaret S., author
Columbia University Press, 1963
Buku Teks
Quirk, James P.
McGraw-Hill, 1968
Buku Teks
Heckscher, Gunnar
Buku Teks