?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Ma%2C+Hing-Keung.&rft.aufirst=Hing-Keung.&rft.aulast=Ma&rft.date=1982&rft.degree=Doctoral&rft.title=A+study+of+moral+development+with+special+reference+to+psychological+needs%2C+human+relationships+and+structures+of+judgement.&rft.inst=Institute+of+Education%2C+University+of+London&rft.tpages=539