APA (7th ed.) Citation

Henn, T. R. (1966). The apple and the spectroscope: Lectures on poetry designed. Norton.

Chicago Style (17th ed.) Citation

Henn, T. R. The Apple and the Spectroscope: Lectures on Poetry Designed. New York: Norton, 1966.

MLA (9th ed.) Citation

Henn, T. R. The Apple and the Spectroscope: Lectures on Poetry Designed. Norton, 1966.

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