I need to define a data structure recursively in Javascript. Here is a simple example of a circular linked list:

// List a very simplified example of what the actual (non list) code does.
function List(f, r) {
    return function(){ return [f, r]; };
}

var head = List('a', List('b', List('c', head)));

When this is executed, head in List 'c' is resolved to undefined, not List 'a' as I need. List is an example function that returns a function (It is not an Javascript list that I can append to).

I tried to wrap the definition of head is a self executing named function, but that blew the stack when head was resolved.

What is the Javascript style solution that I am overlooking?