Mussen, Paul H., author
Harper & Row, 1956
Buku Teks
Ribble, Margaret A., author
Columbia University, 1958
Buku Teks
Hall, Calvin Springer, 1909-1985, author
John Wiley & Sons, 1997
Buku Teks
edited by H.J. Eysenck
Springer-Verlag, 1981
Buku Teks
Hall, Calvin Springer, 1909-1985, author
John Wiley & Sons, 1978
Buku Teks