Call a "local" function within module.exports from another function in module.exports?

How do you call a function from within another function in a `module.exports` declaration? app.js ``` var bla = require('./bla.js'); console.log(bla.bar()); ``` bla.js ``` module.exports = { foo: function (req, res, next) { return ('foo'); }, bar: function(req, res, next) { this.foo(); } } ``` I'm trying to access the function `foo` from within the function `bar`, and I'm getting: TypeError: Object # has no method 'foo' If I change `this.foo()` to just `foo()` I get: ReferenceError: foo is not defined