Tribe, John
Butterworth-Heinemann , 1999
Buku Teks
edited by Carol Jones, Elaine Barclay and Rob I. Mawby
Routledge, 2012
Buku Teks
Candela, Guido, author
[Springer, ], 2012
eBooks
Lindauer, John, author
Saunders , 1977
Buku Teks
Raftery, John
BSP Professional Books, 1991
Buku Teks