Kruse, Benedict, author
McGraw-Hill, 1976
Buku Teks
Hewings, Martin, author
Cambridge University Press, 2006
Buku Teks
Thomas Cable
Prentice-Hall, 1993
Buku Teks
Muhibbin Syah, author
RajaGrafindo Persada, 2010
Buku Teks
Strutt, Peter, author
Pearson, 2019
Buku Teks