Powell-Smith, V. (1990). Contract documentation for contractors. BSP Professional Books.
Chicago Style aipamenaPowell-Smith, Vincent. Contract Documentation for Contractors. Oxford: BSP Professional Books, 1990.
MLA aipamenaPowell-Smith, Vincent. Contract Documentation for Contractors. BSP Professional Books, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.