APA (7th ed.) Citation

Butler, P. (1967). An introduction to library science (4. impr.). Phoenix Books.

Chicago Style (17th ed.) Citation

Butler, Pierce. An Introduction to Library Science. 4. impr. Chicago [u.a.]: Phoenix Books, 1967.

MLA (9th ed.) Citation

Butler, Pierce. An Introduction to Library Science. 4. impr. Phoenix Books, 1967.

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