Katzmann, Robert A.
Oxford University Press, 2014
Buku Teks
edited by D. Mackenzie Davey and Marjorie Harris
McGraw-Hill, 1982
Buku Teks
Burton, Steven J.
Canbridge University Press, 1992
Buku Teks
editor, Patrick Davey ; penerjemah, Annisa Rahmalia
Erlangga, 2005
Buku Teks
Lele, R.D.
Tata McGraw-Hill, 1993
Buku Teks SO