APA (7th ed.) Citation

Knobel, E. (1895). The day butterflies and duskflyers of New England: How to find and know them. B. Whidden.

Chicago Style (17th ed.) Citation

Knobel, Edward. The Day Butterflies and Duskflyers of New England: How to Find and Know Them. Boston: B. Whidden, 1895.

MLA (9th ed.) Citation

Knobel, Edward. The Day Butterflies and Duskflyers of New England: How to Find and Know Them. B. Whidden, 1895.