Herring, J. How to Decide: What to do when you don't know what to do (1.). Pearson Education UK.
Chicago-referens (17:e uppl.)Herring, Jonathan. How to Decide: What to Do When You Don't Know What to Do. 1. Pearson Education UK.
MLA-referens (8:e uppl.)Herring, Jonathan. How to Decide: What to Do When You Don't Know What to Do. 1. Pearson Education UK.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.