APA (7th ed.) Citation

Schumacher, E. F. (1977). A guide for the perplexed. Sphere Books.

Chicago Style (17th ed.) Citation

Schumacher, E. F. A Guide for the Perplexed. London: Sphere Books, 1977.

MLA (9th ed.) Citation

Schumacher, E. F. A Guide for the Perplexed. Sphere Books, 1977.

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