Watt, Helen, author
Routledge , 2000
Buku Teks
Shafira Nurizka Poundrianagari, author
Fakultas Ilmu Pengetahuan dan Budaya Universitas Indonesia, 2020
UI - Makalah dan Kertas Kerja
Seedhouse, David, author
Sage Publications, 2019
eBooks
Harris, Dean M., 1951-, author
Jossey-Bass, 2011.
Buku Teks
edited by Tom Sorell
Routledge, 1998
Buku Teks