Guilford, J. P. (Joy Paul), 1897-1987, author
McGraw-Hill, 1987
Buku Teks
Ferguson, George Andrew, author
McGraw-Hill , 1981
Buku Teks
Ferguson, George Andrew, author
McGraw-Hill , 1989
Buku Teks
Ferguson, George Andrew, author
McGraw-Hill, 1987
Buku Teks
Thurtone, L.L., author
Macmillan, 1925
Buku Teks