Turabian, Kate L., author
University of Chicago Press, 1982
Buku Teks
Waddell, Joseph J., author
McGraw-Hill, 1985
Buku Referensi
Lawson, Joseph W.R., II, author
American Management Association, 1998
eBooks
Fowler, Nick, 1967-, author
McGraw-Hill, 2012
Buku Teks
Sandige, Richard S., author
McGraw-Hill, 1978
Buku Teks