Creating a Bing and Google Tile Layer for Leaflet

I want to use the Leaflet Javascript Library to display both a Google and Bing Tile Layer, though I'm unsure how to construct the url. The documentation shows an example using OSM:

var cloudmadeUrl = 'http://{s}.tile.cloudmade.com/YOUR-API-KEY/997/256/{z}/{x}/{y}.png', cloudmade = new L.TileLayer(cloudmadeUrl, {maxZoom: 18}); 

But for some reason I can't duplicate this for either Bing or Google. Any ideas?

Thanks.

Source: http://gis.stackexchange.com/questions/18598/creating-a-bing-and-google-tile-layer-for-leaflet

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