Barnard, Alan
Cambridge University Press, 2011
Buku Teks
Walter Reich ... [and others] ; penerjemah, Sugeng ; editor, Jiwo Wungu
Murai Kencana, 2003
Buku Teks
edited by Henry Wechsler, Leonard Solomon, Bernard M. Kramer
Holt, Rinehart and Winston, 1970
Buku Teks
Golightley, Malcom
Learning matters Ltd., 2008
Buku Teks
Karban, Kate
UK Polity Press, 2011
Buku Teks