Multiple Models In A Controller

There are several ways to do this, but in my application, only one seems to work. 

$this -> loadModel("Model");

From my reading it seems there are an assortment of ways to include a Model that doesn't require re-loading a Model everytime I need it (assuming I need it multiple times within a controller) But in my code App::Uses and the $uses = array() do not work- they throw errors. 

So I'm clearly missing some small little detail. Could someone point it out to me? 

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