Conant, James B., author
Harvard University Press, 1958
Buku Teks
Mott, Graham, author
Pitman, 1997
Buku Teks
edited by Philip M. Hauser and Otis Dudley Duncan
The University of Chicago Press, 1959
Buku Teks
Shenkel, William M., author
McGraw-Hill , 1978
Buku Teks
Beveridge, Wilbert Esler, author
Allen & Unwin, 1975
Buku Teks