Não informado. (1990). Personnel Training and Education. Library Association, Personnel Training and Education Group.
Chicago (17e ed.) BronvermeldingNão informado. Personnel Training and Education. London: Library Association, Personnel Training and Education Group, 1990.
MLA (8e ed.) BronvermeldingNão informado. Personnel Training and Education. Library Association, Personnel Training and Education Group, 1990.
Let op: Deze citaties zijn niet altijd 100% accuraat.