Παραπομπή σε μορφή APA (7η εκδ.)

Sewell, W. R. D., & Foster, H. D. (1976). Images of Canadian futures: The role of conservation and renewable energy. Environment Canada.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Sewell, W. R. Derrick, και Harold D. Foster. Images of Canadian Futures: The Role of Conservation and Renewable Energy. Ottawa: Environment Canada, 1976.

Παραπομπή σε μορφή MLA (8th εκδ.)

Sewell, W. R. Derrick, και Harold D. Foster. Images of Canadian Futures: The Role of Conservation and Renewable Energy. Environment Canada, 1976.