ROWEL,Derek. System dynamics an introductionDerek Rowell; David n. Wormley. Pretice Hall.
Lua i Stíl Chicago (17ú heag.)ROWEL,Derek. System Dynamics an IntroductionDerek Rowell; David N. Wormley. Pretice Hall.
Lua MLA (8ú heag.)ROWEL,Derek. System Dynamics an IntroductionDerek Rowell; David N. Wormley. Pretice Hall.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.