Crowe, B. (1975). The playgroup movement (Rev. ed.). Published in conjunction with the Pre-school Playgroups Association [by] Allen & Unwin.

Crowe, Brenda. The Playgroup Movement. Rev. ed. London: Published in conjunction with the Pre-school Playgroups Association [by] Allen & Unwin, 1975.

Crowe, Brenda. The Playgroup Movement. Rev. ed. Published in conjunction with the Pre-school Playgroups Association [by] Allen & Unwin, 1975.