Schmidt, Willem Johannes
Rijks-Universiteit, 1947
Buku Teks
Haeseryn, Walter Jan Maria, author
[publisher not identified], 1990
Buku Teks
Sutrisno Hadi, author
Yayasan Penerbitan Fakultas Psikologi UGM, 1984
Buku Teks
ITB Press, 2007
Multimedia
Schmidt, Willem Johannes
Groningen [t.p.] [t.th.]
Buku Teks