Frost, Nollaig
McGraw-Hill, 2011
Buku Teks
bt Peter Banister ... [and others]
Open University Press, 2006
Buku Teks
by Peter Banister ... [et al.]
McGraw-Hill, 2011
Buku Teks
Psychology Press, 2004
Buku Teks
Dunn, Dana S.
Wiley-Blackwell, 2009
Buku Teks