Update README.rst

adding better citation info for joss/naif

README.rst

@@ -41,11 +41,17 @@ code is provided "as is", use at your own risk. However, the NAIF now distribute
 Citing SpiceyPy
 ---------------
 
-If you are publishing work that uses SpiceyPy, please cite
-SpiceyPy and the SPICE toolkit. The citation information
-for SPICE can be found on the NAIF website. To cite SpiceyPy please
-utilize the zenodo DOI badge at the top of this readme. To cite information 
-about SpiceyPy, usership, and how it works please cite my 2017 abstract, available with citation info at : `<https://ui.adsabs.harvard.edu/#abs/2017LPICo1986.7081A>`__.
+If you are publishing work that uses SpiceyPy, please cite SpiceyPy and the SPICE toolkit.
+
+SpiceyPy can be cited using the JOSS DOI (`https://doi.org/10.21105/joss.02050`) or with the following:
+    Annex et al., (2020). SpiceyPy: a Pythonic Wrapper for the SPICE Toolkit. Journal of Open Source Software, 5(46), 2050, https://doi.org/10.21105/joss.02050
+
+Instructions for how to cite the SPICE Toolkit are available on the NAIF website: 
+    https://naif.jpl.nasa.gov/naif/credit.html. 
+
+To cite information about SpiceyPy usage statistics, please cite my 2017 and or 2019 abstracts as appropriate below:
+    1. 2017 abstract: `<https://ui.adsabs.harvard.edu/abs/2017LPICo1986.7081A/abstract>`__.
+    2. 2019 abstract: `<https://ui.adsabs.harvard.edu/abs/2019LPICo2151.7043A/abstract>`__.
 
 Installation
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