Heppell, M. How to Have a Brilliant Life: Put a little bit more in. Get so much more out (2.). Pearson Education UK.
Lua i Stíl Chicago (17ú heag.)Heppell, Michael. How to Have a Brilliant Life: Put a Little Bit More in. Get so Much More Out. 2. Pearson Education UK.
Lua MLA (8ú heag.)Heppell, Michael. How to Have a Brilliant Life: Put a Little Bit More in. Get so Much More Out. 2. Pearson Education UK.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.