Clark, Margaret M., 1926-
Scholastic , 1994
Buku Teks
Donna A. Morere, editor
[, Springer], 2012
eBooks
Pasaribu, Dexon, author
Fakultas Psikologi Universitas Indonesia, 2010
UI - Tesis (Open)
Dupuis, Mary M.
Prentice-Hall, 1982
Buku Teks
O dea, Thomas F.
Prentice-Hall, 1973
Buku Teks