Johnson, David W., 1940-, author
Pearson, 2017
Buku Teks
Jackson-Dwyer, Diana, 1949-, author
Routledge, 2014
Buku Teks
Wood, Julia T., 1950-, author
Wadsworth and Cengage Learning, 2013
Buku Teks
Hoy, Wayne K., author
Random House , 1978
Buku Teks
Johnson, David W., 1940-, author
Prentice-Hall, 1987
Buku Teks