Bunge, C. A. (1967). Professional education and reference efficiency. Illinois State Library.
Cita Chicago (17th ed.)Bunge, Charles A. Professional Education and Reference Efficiency. Springfiled: Illinois State Library, 1967.
Cita MLA (9th ed.)Bunge, Charles A. Professional Education and Reference Efficiency. Illinois State Library, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.