Artikel Jurnal
Elly M Setiadi, author
Prenada Kencana, 2006
Buku Teks
Kevin Wilyan, author
2017
UI - Skripsi (Membership)
Sulismadi, author
Universitas Muhammadiyah Malang, 2011
Buku Teks
Kushartanti, author
University of Indonesia, Faculty of Humanities, 2007
Artikel Jurnal