Jacobson, A. (1992). Think, think, think now!: Material and methods for problem solving. Phoenix Pub.
Lua i Stíl Chicago (17ú heag.)Jacobson, Andrew. Think, Think, Think Now!: Material and Methods for Problem Solving. Quezon City: Phoenix Pub, 1992.
Lua MLA (9ú heag.)Jacobson, Andrew. Think, Think, Think Now!: Material and Methods for Problem Solving. Phoenix Pub, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.