Berk, Laura E., author
Allyn and Bacon, 1997
Buku Teks
Berk, Laura E., author
Allyn and Bacon, 1989
Buku Teks
Hurlock, Elizabeth Bergner, 1898-, author
McGraw-Hill, 1956
Buku Teks
Hurlock, Elizabeth Bergner, 1898-, author
Tata McGraw-Hill, 1994
Buku Teks
McCandless, Boyd R
Holt Reinhard and Winston, 1967
Buku Teks