Allen, L. A. (1975). Professional management: New concepts and proven practices. Tata McGraw-Hill.
استشهاد بنمط شيكاغوAllen, Louis A. Professional Management: New Concepts and Proven Practices. Tata McGraw-Hill, 1975.
MLA استشهادAllen, Louis A. Professional Management: New Concepts and Proven Practices. Tata McGraw-Hill, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.