Smith, Ken
Pitman, 1981
Buku Teks SO
J.M. Smith, Hendrick van Ness, Michael Abbott, Mark Swihart, authors
McGraw-Hill, 2018
Buku Teks
Fowler, Nick, 1967-
McGraw-Hill, 2012
Buku Teks
Tuma, Jan J.
McGraw-Hill, 1982
Buku Teks
Lindeburg, Michael R.
Professional Publications, 1984
Buku Teks