var SomeView = Backbone.View.extend({

    collection: new SomeCollection(),

    render: function() {
        this.$el.empty();
        this.collection.each( function (modelInCollection) {
            var newView = new AnotherView({ model: modelInCollection });
            this.$el.append(newView.render().el);
        }, this);
});

this.$el.append(newView.render().el);

this.$el.append(newView.render().$el);