* [http://www.hmrc.gov.uk/incometax/personal-allow.htm hmrc.gov.uk/incometax/personal-allow] - stupně personal allowance
+
* [http://www.direct.gov.uk/en/MoneyTaxAndBenefits/Taxes/BeginnersGuideToTax/IncomeTax/Taxallowancesandreliefs/DG_078571 direct.gov.uk/...] - O personal allowance.
+
* [http://www.hmrc.gov.uk/incometax/personal-allow.htm hmrc.gov.uk/incometax/personal-allow] - Stupně personal allowance