APA (7th ed.) Citation

Harper, G. M. (1976). Yeats and the occult. Macmillan.

Chicago Style (17th ed.) Citation

Harper, George Mills. Yeats and the Occult. London [etc.]: Macmillan, 1976.

MLA (8th ed.) Citation

Harper, George Mills. Yeats and the Occult. Macmillan, 1976.

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