Gross, H. (1966). Make or buy ; detailed guidelines to assist in analyzing, formulating and concluding make or buy decisions. Prentice-Hall.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিGross, Harry. Make or Buy ; Detailed Guidelines to Assist in Analyzing, Formulating and Concluding Make or Buy Decisions. Englewood Cliffs, N. J: Prentice-Hall, 1966.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিGross, Harry. Make or Buy ; Detailed Guidelines to Assist in Analyzing, Formulating and Concluding Make or Buy Decisions. Prentice-Hall, 1966.
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