Hartaty Sarma Sangkot
Universitas Indonesia, 2008
UI - Skripsi (Open)
edited by Carole Lium Edelman, Carol Lynn Mandle
Mosby Elsevier, 2010
Buku Teks
Carl I. Fertman, Diane D. Allensworth
Jossey-Bass , 2017
Buku Teks
edited by John Kenneth Davies, Gordon Macdonald
Routledge, 1998
Buku Teks
Edelman, Carole Lium
Mosby , 1994
Buku Teks