diff --git a/Doc/library/json.rst b/Doc/library/json.rst
--- a/Doc/library/json.rst
+++ b/Doc/library/json.rst
@@ -230,16 +230,18 @@ Basic Usage
    *encoding* which is ignored and deprecated.
 
 
 Encoders and decoders
 ---------------------
 
 .. class:: JSONDecoder(object_hook=None, parse_float=None, parse_int=None, parse_constant=None, strict=True, object_pairs_hook=None)
 
+   **Source code:** :source:`Lib/json/decoder.py`
+
    Simple JSON decoder.
 
    Performs the following translations in decoding by default:
 
    +---------------+-------------------+
    | JSON          | Python            |
    +===============+===================+
    | object        | dict              |
@@ -311,16 +313,18 @@ Encoders and decoders
       and the index in *s* where the document ended.
 
       This can be used to decode a JSON document from a string that may have
       extraneous data at the end.
 
 
 .. class:: JSONEncoder(skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, sort_keys=False, indent=None, separators=None, default=None)
 
+   **Source code:** :source:`Lib/json/encoder.py`
+
    Extensible JSON encoder for Python data structures.
 
    Supports the following objects and types by default:
 
    +-------------------+---------------+
    | Python            | JSON          |
    +===================+===============+
    | dict              | object        |