Severin, Werner J., author
Longman, 1991
Buku Teks
Feist, Jess, author
McGraw-Hill, 2018
Buku Teks
Vincent, Andrew
Basil Blackwell, 1987
Buku Teks
Ryckman, Richard M., author
Wadsworth and Cengage Learning, 2013
Buku Teks
Feist, Jess, author
McGraw Hil , 2013
Buku Teks