Clegg, C. J.
John Murray, 1994
Buku Referensi
Starr, Cecie, author
Brooks/Cole, 2002
Buku Teks
edited by Woei Jye Lau ... [and others]
Elsevier, 2019
Buku Teks
Dyke, Fred Van
McGraw-Hill, 2003
Buku Teks
Liang, Kung-Hao, author
Philadelphia : Woodhead Pub, 2013
Buku Teks