Sembiring, Nasib, author
Kanisius, 2013
Buku Teks
Suardiman
Studing, [date of publication not identified]
Buku Teks
Nurul Hartini, author
Airlangga University Press (AUP), 2016
Buku Teks
Bailliere Tindall , 2001
Buku Teks
Webdy R.Uhlmann, Jane L. Schuette, Baverly M. Yashar, Beverly M., editor
John Wiley & Sons, 2009
Buku Teks