diff --git a/schwab/client/base.py b/schwab/client/base.py
index 49feaf4..48a7b1a 100644
--- a/schwab/client/base.py
+++ b/schwab/client/base.py
@@ -444,6 +444,9 @@ class Quote:
         class Fields(Enum):
             QUOTE = 'quote'
             FUNDAMENTAL = 'fundamental'
+            EXTENDED = 'extended'
+            REFERENCE = 'reference'
+            REGULAR = 'regular'
 
     def get_quote(self, symbol, *, fields=None):
         '''