Gesell, Arnold
Harper & Row, 1949
Buku Teks SO
Hurlock, Elizabeth Bergner, 1898-
McGraw-Hill, 1956
Buku Teks
Hurlock, Elizabeth Bergner, 1898-
Tata McGraw-Hill, 1994
Buku Teks
Breckenridge, Marian E.
W.B. Saunders, 1949
Buku Teks SO
Santrock, John W.
McGraw-Hill, 2001
Buku Teks SO