Sproull Bob. (2018). Problem Solving, Problem Prevention and Decision Making Guide. Routledge.
Lua i Stíl Chicago (17ú heag.)Sproull Bob. Problem Solving, Problem Prevention and Decision Making Guide. Routledge, 2018.
Lua MLA (9ú heag.)Sproull Bob. Problem Solving, Problem Prevention and Decision Making Guide. Routledge, 2018.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.