Dobbin, Christine
Oxford University Press, 1972
Buku Teks
Corburn, jason
The Mitt Press, 2009
Buku Teks
Schwarze, Tilman
Palgrave Macmillan Cham, 2023
eBooks
Jonathan Darling, Helen F. Wilson
Routledge, Taylor & Francis Group, 2016
Buku Teks SO
Smith, Neil
Routledge, 1996
Buku Teks SO