McLaughlin, Curtis P., author
Jones & Bartlett Learning, 2012
Buku Teks
Waller, Jenny, author
Pustaka Binaman Pressindo, 1994
Buku Referensi
Goetsch, David L., author
Pearson, 2016
Buku Teks
Hradesky, John L., author
McGraw-Hill, 1995
Buku Referensi
by Dale H. Besterfield ... [and others]
Prentice-Hall, 1995
Buku Teks