Simpson, George Gaylord, author
New American Library, 1953
Buku Teks
Solbrig, Otto Thomas
Addison-Wesley, 1979
Buku Teks
Weller, J. Marvin
McGraw-Hill, 1969
Buku Teks
Simpson, George Gaylord, author
Yale University Press, 1952
Buku Teks
Olson, Everett C., author
Charles E. Merrill, 1975
Buku Teks