APA (7th ed.) Citation

Forbes, W. T. M. The North American Families of Lepidoptera. Wiley.

Chicago Style (17th ed.) Citation

Forbes, Wm. T. M. The North American Families of Lepidoptera. Wiley.

MLA (9th ed.) Citation

Forbes, Wm. T. M. The North American Families of Lepidoptera. Wiley.

Warning: These citations may not always be 100% accurate.