Cita APA

Butler, P. n. 1., & Butler, P. n. 1. (1961). An introduction to library science. Chicago: University of Chicago Press.

Citación estilo Chicago

Butler, Pierce n. 1886, y Pierce n. 1886 Butler. An Introduction to Library Science. Chicago: University of Chicago Press, 1961.

Cita MLA

Butler, Pierce n. 1886, y Pierce n. 1886 Butler. An Introduction to Library Science. Chicago: University of Chicago Press, 1961.