Hegar, Kathryn
Study guide for business / Kathryn Hegar
Houghton Mifflin, 1985
 Buku Teks
Lindstrom, Robert L.
Business week guide to multimedia presentations / Robert L. Lindstrom
McGraw-Hill , 1994
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Keith, Lyman A.
Study guide to accompany : introduction to business enterprise
McGraw-Hill, 1975
 Buku Teks SO
Paulson, Edward
The complete ideal's guide starting your own business
Prenada Media, 2003
 Buku Teks SO
Firdaus Abdullah
Cermin belakang / Firdaus Abdullah.
Utusan Publications , 2013
 Buku Teks SO