APA Style

LOCKE, John. (1997). An Essay Concerning Human Understanding . London: Penguin Books.

Chicago Style

LOCKE, John. An Essay Concerning Human Understanding. London: Penguin Books, 1997. Text.

MLA Style

LOCKE, John. An Essay Concerning Human Understanding. London: Penguin Books, 1997. Text.

Turabian Style

LOCKE, John. An Essay Concerning Human Understanding. London: Penguin Books, 1997. Print.