Routledge, 2018
Buku Teks
editors, Robert Sembiring, Kees Hoogland, Maarten Dolk
Utrecht, 2010
Buku Teks
Haveman, Robert H
Academic Press, 1977
Buku Teks
Harrington, Michael
Simon and Schuster, 1980
Buku Teks
Cronin, Blaise, author
Taylor Graham and Contributors, 1991
Buku Teks