Engel, C. E., Ewan, C. E., & Bennett, M. J. (1980). Proceedings of the intercountry workshop on the development of instructional materials: Sponsored by the World Health Organization and held at the WHO Western Pacific Regional Teacher Training Centre for Health Personnel, University of New South Wales, 3-15 February 1980. [s.n.] : printed and distributed by the University of New South Wales.

Engel, C. E., Christine E. Ewan, a Michael J. Bennett. Proceedings of the Intercountry Workshop on the Development of Instructional Materials: Sponsored by the World Health Organization and Held at the WHO Western Pacific Regional Teacher Training Centre for Health Personnel, University of New South Wales, 3-15 February 1980. [Sydney, N.S.W.]: [s.n.] : printed and distributed by the University of New South Wales, 1980.

Engel, C. E., et al. Proceedings of the Intercountry Workshop on the Development of Instructional Materials: Sponsored by the World Health Organization and Held at the WHO Western Pacific Regional Teacher Training Centre for Health Personnel, University of New South Wales, 3-15 February 1980. [s.n.] : printed and distributed by the University of New South Wales, 1980.