John, V.B., author
Macmillan, 1983
Buku Teks
John, V.B., author
Macmillan, 1977
Buku Teks
John, Vernon, author
Macmillan, [Date of publication not identified]
Buku Teks
Sri Puji Lestari, author
Fakultas Teknik Universitas Indonesia, 2011
UI - Skripsi (Open)
Ahmed, Ash, author
Routledge, 2015
Buku Teks