Lilly, J. Robert, author
Sage Publications, 1995
Buku Teks
Matt DeLisi, Kevin M. Beaver, editor
Jones and Bartlett Publishers, 2011
Buku Teks
Gibbons, Don C., author
Prentice-Hall, 1992
Buku Teks
Robinson, Matthew B., author
Pearson/Prentice Hall, 2004
Buku Teks
Vold, George B. (George Bryan), 1896-1967, author
Oxford University Press, 1979
Buku Teks