Williams, K. K. (1989). PrelimDrainage, a software system for preliminary design of storm drainage systems. [publisher not identified].
Chicago Style (17th ed.) CitationWilliams, Keith Kim. PrelimDrainage, a Software System for Preliminary Design of Storm Drainage Systems. [Place of publication not identified]: [publisher not identified], 1989.
MLA (9th ed.) CitationWilliams, Keith Kim. PrelimDrainage, a Software System for Preliminary Design of Storm Drainage Systems. [publisher not identified], 1989.
Warning: These citations may not always be 100% accurate.