Denscombe, Martyn, author
Open University Press, 2012
Buku Teks
Enrico Nunzi, Cesare Massone, editors
Springer, 2012
eBooks
Bain, Barbara J., author
Wiley Blackwell, 2015
Buku Teks
edited by Enrico Nunzi, Cesare Massone
Springer-Verlag, 2012
eBooks
Sayer, Faye, author
Bloomsbury, 2015
Buku Teks