diff --git a/doc/manual/citing_aspect.bib b/doc/manual/citing_aspect.bib
index 93719ffe19c..7eae3f3bd48 100644
--- a/doc/manual/citing_aspect.bib
+++ b/doc/manual/citing_aspect.bib
@@ -2289,7 +2289,7 @@ @Article{Xin2024
 title={Effects of upper mantle wind on mantle plume morphology and hotspot track: Numerical modeling},
 journal={Science China Earth Sciences},
 year={2024},
-month={Nov},
+month=nov,
 day={13},
 issn={1869-1897},
 doi={10.1007/s11430-024-1431-4},