Koritelu, Paulus
Universitas Indonesia, 2009
UI - Disertasi (Open)
Lauer, Robert H.
Rineka Cipta, 2003
Buku Teks
Jacob Peniel Ninu
2012
UI - Disertasi (Open)
Garnaut, Ross
Gramedia, 1979
Buku Teks
Moore, Wilbert E. (Wilbert Ellis)
Prentice-Hall, 1963
Buku Teks