make this obvious

Author: mr-c

draft-3/README.md

@@ -19,3 +19,6 @@ The
 [Semantic Annotations for Linked Avro Data (SALAD) Specification](SchemaSalad.html)
 specifies the preprocessing steps that must be applied when loading CWL
 documents and the schema language used to write the above specifications.
+
+If you use the CWL specifications or distribute CWL descriptions with a
+publication you should [cite the standard](https://dx.doi.org/10.6084/m9.figshare.3115156.v1)