Bonner, Frances, author
Sage Publications , 2003
Buku Teks
Langer, John, author
Routledge , 1998
Buku Teks
Bednarek, Monika, author
Cambridge University Press, 2018
eBooks
Kaye, Evelyn
Beacon Press , 1979
Buku Teks
Mochammad Yoerliansah Tangkari, author
Fakultas Teknik Universitas Indonesia, 2010
UI - Skripsi (Open)