Skidmore, S. (1990). Introducing systems design (2th .ed.). NCC Blackwell.
Chicago-čujuhus (17. p.)Skidmore, Steve. Introducing Systems Design. 2th .ed. Manchester: NCC Blackwell, 1990.
MLA-čujuhus (9. p.)Skidmore, Steve. Introducing Systems Design. 2th .ed. NCC Blackwell, 1990.
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