MongoDB referring to/appending schema

Okay so basically I have my events schema:

var eventSchema = mongoose.Schema({
     name:{
         type: String,
     },

etc...

and I have my venue schema:

var venueSchema = mongoose.Schema(
{
     name:{
        type: String,
     },

now I want the events to also contain a venue

How do I code this such that when I call the events it returns the events, with the event data, along with its venue and the venue data, i.e.

{
"events":[
{
    "event_id":"e_1",
        "name":"nameOfEvent",
    "venue":{
        "name":"nameOfVenue" 

etc...

Thanks in advance!!