APA (7th ed.) Citation

Thompson, W. R. (1939). Some beneficial insects ([4th ed.].). H.M. Stationery Off..

Chicago Style (17th ed.) Citation

Thompson, W. R. Some Beneficial Insects. [4th ed.]. London: H.M. Stationery Off., 1939.

MLA (9th ed.) Citation

Thompson, W. R. Some Beneficial Insects. [4th ed.]. H.M. Stationery Off., 1939.