APA (7th ed.) Citation

Butler, P. (1933). An Introduction to library science. Univ. Pr.

Chicago Style (17th ed.) Citation

Butler, Pierce. An Introduction to Library Science. Chicago: Univ. Pr, 1933.

MLA (9th ed.) Citation

Butler, Pierce. An Introduction to Library Science. Univ. Pr, 1933.

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