APA (7th ed.) Citation

Clarke, R. (2013). A natural history of ghosts: 500 years of hunting for proof. Penguin Books.

Chicago Style (17th ed.) Citation

Clarke, Roger. A Natural History of Ghosts: 500 Years of Hunting for Proof. London: Penguin Books, 2013.

MLA (9th ed.) Citation

Clarke, Roger. A Natural History of Ghosts: 500 Years of Hunting for Proof. Penguin Books, 2013.

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