Watson, Jane
Sense, 2012
eBooks
edited by Anne Griffiths, Sanna Mustasaari, and Anna Mäki-Petajä-Leinonen
Routledge, 2017
Buku Teks
Vockell, Edward L.
Macmillan, 1983
Buku Teks
edited by Patrick Baert, Sokratis M. Koniordos, Giovana Procacci, Carlo Rizza
Routledge Kegan Paul, 2010
Buku Teks SO
Hall, Donald E.
Routledge , 2004
Buku Teks SO