Coordinate-Reference-Systems.md

@@ -2,7 +2,7 @@
 
 ## Sources:
 * Tools: http://spatialreference.org/ and http://epsg.io/
-* http://stackoverflow.com/questions/9186496/determining-utm-zone-to-convert-from-longitude-latitude?rq=1
+* [Determining UTM zone (to convert) from longitude/latitude](http://stackoverflow.com/questions/9186496/determining-utm-zone-to-convert-from-longitude-latitude?rq=1) (StackOverflow)
 
 # Code List
 
@@ -25,4 +25,5 @@ UTM Zone 2	| Northern Hemisphere (WGS 84)	| 32602
 UTM Zone 2	| Southern Hemisphere (WGS 84)	| 32702
 ...       	|                             	|
 Explanation: Format "32nsZZ" where ns (6=Northern, 7=Southern) und ZZ = Zone, z.B. 01
-Source: http://reference.mapinfo.com/common/docs/mapxtend-dev-web-none-eng/miaware/doc/guide/xmlapi/coordsys/systems.htm
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+
+[Source](http://reference.mapinfo.com/common/docs/mapxtend-dev-web-none-eng/miaware/doc/guide/xmlapi/coordsys/systems.htm)
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