edited by John A. Agnew, James S. Duncan
Wiley-Blackwell, 2011
Buku Teks
Calhoun, Craig J.
McGraw-Hill , 1994
Buku Teks
Farley, John E.
Prentice-Hall, 1992
Buku Teks
Finsterbusch, Kurt
McGraw-Hill, 2006
Buku Teks
Kurt Finsterbusch, editor
McGraw-Hill, 2007
Buku Teks