APA (7th ed.) Citation

Smith, W. (1899). Methods of knowledge: An essay in epistemology. Macmillan.

Chicago Style (17th ed.) Citation

Smith, Walter. Methods of Knowledge: An Essay in Epistemology. New York London: Macmillan, 1899.

MLA (8th ed.) Citation

Smith, Walter. Methods of Knowledge: An Essay in Epistemology. Macmillan, 1899.