Artikel Jurnal
Tatang Subarna, author
Universitas Terbuka, 2002
Buku Teks
Panuju, Redi, author
Gramedia Pustaka Utama, 2000
Buku Teks
edited by Peggy Simcic Brønn, Stefania Romenti, Ansgar Zerfass
Emerald, 2016
eBooks
Curtis, Dan B., author
Remaja Rosdakarya, 1998
Buku Teks