Miles, Robert H.
Goodyear Publishing Company, 1980
Buku Teks
Gibson, James L., author
Erlangga, 1996
Buku Teks
Morgan, Gareth
Sage Publications, 1986
Buku Teks
Griffin, Ricky W., author
Cengage Learning, 2014
Buku Teks
Agarwal, R. D., author
Tata McGraw-Hill, 1986
Buku Teks