Merrill, W. S. (1939). Code for classifiers: Principles governing the consistent placing of books in a system of classification (2nd ed.). American Library Association.
Citación estilo ChicagoMerrill, William Stetson. Code for Classifiers: Principles Governing the Consistent Placing of Books in a System of Classification. 2nd ed. Chicago: American Library Association, 1939.
Cita MLAMerrill, William Stetson. Code for Classifiers: Principles Governing the Consistent Placing of Books in a System of Classification. 2nd ed. American Library Association, 1939.
Warning: These citations may not always be 100% accurate.