Rivers, William L., author
Prenadamedia Group, 2015
Buku Teks
Wilson, Stan Le Roy, author
McGraw-Hill, 1995
Buku Teks
Biagi, Shirley, author
Wadsworth and Cengage Learning, 2012
Buku Teks
Biagi, Shirley, author
Cengage Learning, 2015
Buku Teks
Vivian, John, author
Pearson and AB, 2007
Buku Teks