Artikel Jurnal
Colombo Plan Staff College for Technician education , 1986
Buku Teks
Carnevale, Anthony P.
Dept. of Education, Office Educational Research and Improvement , 1994
Buku Teks
Wiranda G. Piliang, Lukman Rahardja, editor
Life Science Inter University Center, Faculty of Graduate Studies, Bogor Agricultural University, 1990
Buku Referensi
Dirk Schaefer, Graham Coates, Claudia Eckert, editors
Springer Nature, 2019
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