APA (7th ed.) Citation

Canada. Industry, Science and Technology Canada, Business Opportunities Sourcing System (Canada), & Canada Software Products and Informatic Services Directorate. (1980). Directory of computer software and services. Industry, Science and Technology Canada.

Chicago Style (17th ed.) Citation

Canada. Industry, Science and Technology Canada, Business Opportunities Sourcing System (Canada), and Canada Software Products and Informatic Services Directorate. Directory of Computer Software and Services. [Ottawa]: Industry, Science and Technology Canada, 1980.

MLA (8th ed.) Citation

Canada. Industry, Science and Technology Canada, et al. Directory of Computer Software and Services. Industry, Science and Technology Canada, 1980.