diff --git a/sale.py b/sale.py
index 93bda54..4be4d81 100644
--- a/sale.py
+++ b/sale.py
@@ -141,12 +141,16 @@ class Sale(metaclass=PoolMeta):
         if args.get('shipment_date'):
             shipment_date = args['shipment_date']
 
+        reference = args.get('reference', None)
+        invoice_type = args.get('invoice_type', 'P')
+
         description = args.get('description', '')
         comment = args.get('comment', '')
         today = date.today()
         to_create = {
             'shop': shop.id,
-            'invoice_type': 'P',
+            'invoice_type': invoice_type,
+            'reference': reference,
             'company': shop.company.id,
             'party': party.id,
             'sale_date': today,