LESLIE (Robert E), . (1986). Systems Analysis and Design Method and Invention. New Delhi: Prentice Hall of India New Delhi.
LESLIE (Robert E), . 1986. Systems Analysis and Design Method and Invention. New Delhi: Prentice Hall of India New Delhi.
LESLIE (Robert E), . Systems Analysis and Design Method and Invention. New Delhi: Prentice Hall of India New Delhi. 1986.