APA (7th ed.) Citation

South, R., & Edelsten, H. M. (1941). The butterflies of the British Isles (New ed.). Frederick Warne & Co..

Chicago Style (17th ed.) Citation

South, Richard, and H. M. Edelsten. The Butterflies of the British Isles. New ed. London : New York: Frederick Warne & Co., 1941.

MLA (9th ed.) Citation

South, Richard, and H. M. Edelsten. The Butterflies of the British Isles. New ed. Frederick Warne & Co., 1941.