Fletchers, Robert H.
Williams and Wilkins, 1984
Buku Teks
MacMahon, Brian, author
Little, Brown and Company, 1970
Buku Teks
Checkoway, Harvey
Oxford University Press , 1989
Buku Teks
by Harvey Checkoway, Neil Pearce, Douglas J. Crawford-Brown
Oxford University Press, 1989
Buku Teks
Magnus, Manya, author
MA Jones & Bartlett Learning, 2016
Buku Teks