Canadian Forestry Service & Hedlin, A. F. (1980). Cone and seed insects of North American conifers. Canadian Forestry Service.
Chicago Style (17th ed.) CitationCanadian Forestry Service and Alan F. Hedlin. Cone and Seed Insects of North American Conifers. [Ottawa]: Canadian Forestry Service, 1980.
MLA (9th ed.) CitationCanadian Forestry Service and Alan F. Hedlin. Cone and Seed Insects of North American Conifers. Canadian Forestry Service, 1980.
Warning: These citations may not always be 100% accurate.