diff --git a/src/Faker/Provider/pt_PT/Address.php b/src/Faker/Provider/pt_PT/Address.php
index c145a77a..8e3dca9b 100644
--- a/src/Faker/Provider/pt_PT/Address.php
+++ b/src/Faker/Provider/pt_PT/Address.php
@@ -20,10 +20,12 @@ class Address extends \Faker\Provider\Address
         '{{streetName}}, {{buildingNumber}}, {{secondaryAddress}}',
     );
 
+    /** @link http://www.univ-ab.pt/PINTAC/carta_normas.htm address example in letters **/
     protected static $addressFormats = array(
         "{{streetAddress}}\n{{postcode}} {{city}}",
     );
 
+    /** @link http://www.mapadeportugal.net/indicecidades.asp **/
     private static $cities = array(
         'Abrantes', 'Agualva-Cacém', 'Águeda', 'Albufeira', 'Alcácer do Sal', 'Alcobaça', 'Almada', 'Almeirim', 'Alverca do Ribatejo', 'Amadora', 'Amarante', 'Amora', 'Anadia', 'Angra do Heroísmo', 'Aveiro', 'Barcelos', 'Barreiro',
         'Beja', 'Braga', 'Bragança', 'Caldas da Rainha', 'Camara de Lobos', 'Cantanhede', 'Cartaxo', 'Castelo Branco', 'Chaves', 'Coimbra', 'Covilhã', 'Elvas', 'Entroncamento', 'Ermesinde', 'Esmoriz', 'Espinho', 'Esposende', 'Estarreja',
@@ -59,7 +61,8 @@ class Address extends \Faker\Provider\Address
     {
         return static::numerify(static::randomElement(static::$secondaryAddressFormats));
     }
-    
+
+    /** @link http://www.indexmundi.com/pt/ **/
     protected static $country = array(
         'Afeganistão', 'África do Sul', 'Albânia', 'Alemanha', 'Andorra',
         'Angola', 'Antigua e Barbuda', 'Arabia Saudita', 'Argélia',