Pennick, J. E., & Stiles, J. R. (1990). Sustainable development for a new world agenda: Proceedings of a conference, Winnipeg, Manitoba, Canada, October 17-20, 1990. The World Environment Energy and Economic Conference.

Pennick, John E., and John R. Stiles. Sustainable Development for a New World Agenda: Proceedings of a Conference, Winnipeg, Manitoba, Canada, October 17-20, 1990. [Manitoba, Canada: The World Environment Energy and Economic Conference, 1990.

Pennick, John E., and John R. Stiles. Sustainable Development for a New World Agenda: Proceedings of a Conference, Winnipeg, Manitoba, Canada, October 17-20, 1990. The World Environment Energy and Economic Conference, 1990.