Guilford, J. P. (Joy Paul), 1897-1987, author
McGraw-Hill , 1978
Buku Teks
Hamburg, Morris, author
Harcourt Brace Jovanovick, 1985
Buku Teks
Hogg, Robert V., author
Macmillan, 1969
Buku Teks
Mills, Richard L., author
McGraw-Hill Kogakusha, 1977
Buku Teks
Gravetter, Frederick J., author
Cengage Learning, 2013
Buku Teks