Gilmer, B. von Haller (Beverly von Haller), 1909-1994, author
McGraw-Hill, 1966
Buku Teks
Feldman, Robert S., author
McGraw-Hill, 1989
Buku Teks
Blum, Milton L., author
Harper & Row, 1968
Buku Teks
Riggio, Ronald E., author
Routledge, 2016
Buku Teks
Nicolson, Paula, author
MacMillan Education, 1986
Buku Teks