Smith, G. (1978). Wealth creation: The added value concept. London: Institute of Practitioners in Work study, Organisation and Methods.
শিকাগো স্টাইলে সাইটেশনSmith, Geoff. Wealth Creation: The Added Value Concept. London: Institute of Practitioners in Work study, Organisation and Methods, 1978.
এমএলএ সাইটেশনSmith, Geoff. Wealth Creation: The Added Value Concept. London: Institute of Practitioners in Work study, Organisation and Methods, 1978.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.