Bauer, Raymond A., author
Harvard University Press, 1952; 1959
Buku Teks
Ulam, Adam B.
Harvard University Press, 1963
Buku Teks
Webb, Sidney, author
Longman, 1947
Buku Teks
Dallin, David J., author
Hollis & Carter, 1951
Buku Teks
Haanel, Charles F, author
Mind Power Corporation, 2006
Buku Teks