Pergamon Press, 2018
Majalah, Jurnal, Buletin
Oxford : Pergamon Press Ltd
Majalah, Jurnal, Buletin
Gordon, Gary R. , author
Elsevier, 2012
Buku Teks
Souryal, Sam S., 1930-, author
Elsevier, 2011
Buku Teks
Bachman, Ronet, author
Pine Forge Press, 2003
Buku Teks