Jarmul, Seymour
McGraw-Hill, 1980
Buku Teks
Christina J. Hopfe and Robert S. McLeod, editors
Routledge, Taylor & Francis Group, 2017
Buku Teks
Duran, Sergi Costa, author
Page One , 2011
Buku Referensi
edited by Donald Watson
McGraw-Hill , 1979
Buku Teks
Harris, Douglas, author
Spon Press, 2012
Buku Teks