APA (7th ed.) Citation

Mackie, P. (2009). How things might have been: Individuals, kinds, and essential properties (1. publ. in paperback.). Clarendon Press.

Chicago Style (17th ed.) Citation

Mackie, Penelope. How Things Might Have Been: Individuals, Kinds, and Essential Properties. 1. publ. in paperback. Oxford [u. a.]: Clarendon Press, 2009.

MLA (9th ed.) Citation

Mackie, Penelope. How Things Might Have Been: Individuals, Kinds, and Essential Properties. 1. publ. in paperback. Clarendon Press, 2009.