APA (7th ed.) Citation

Hopkins, A. D. (1901). Insect enemies of spruce in Northeast: Popular account of results of special investigations, with recommendations for preventing losses. U.S. Government Printing Office.

Chicago Style (17th ed.) Citation

Hopkins, A. D. Insect Enemies of Spruce in Northeast: Popular Account of Results of Special Investigations, with Recommendations for Preventing Losses. [Washington, D.C.]: U.S. Government Printing Office, 1901.

MLA (9th ed.) Citation

Hopkins, A. D. Insect Enemies of Spruce in Northeast: Popular Account of Results of Special Investigations, with Recommendations for Preventing Losses. U.S. Government Printing Office, 1901.