Mullins, R. K., & Cooper, D. A. (1972). Programmed technical drawing: SI units. Hutchinson.
Lua i Stíl Chicago (17ú heag.)Mullins, R. K., agus D. A. Cooper. Programmed Technical Drawing: SI Units. London: Hutchinson, 1972.
Lua MLA (9ú heag.)Mullins, R. K., agus D. A. Cooper. Programmed Technical Drawing: SI Units. Hutchinson, 1972.
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