APA (7th ed.) Citation

Butler, P. (1961). An Introduction to library science (2nd impression.). University of Chicago Press.

Chicago Style (17th ed.) Citation

Butler, Pierce. An Introduction to Library Science. 2nd impression. Chicago: University of Chicago Press, 1961.

MLA (9th ed.) Citation

Butler, Pierce. An Introduction to Library Science. 2nd impression. University of Chicago Press, 1961.

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