Allen, L. A. (1975). Professional management: New concepts and proven practices. Tata McGraw-Hill.
Čikaški stil citiranjaAllen, Louis A. Professional Management: New Concepts and Proven Practices. Tata McGraw-Hill, 1975.
MLA način citiranjaAllen, Louis A. Professional Management: New Concepts and Proven Practices. Tata McGraw-Hill, 1975.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.