diff --git a/guide/english/computer-science/databases/relational-databases/index.md b/guide/english/computer-science/databases/relational-databases/index.md
index ae956f6cd7..1c9bb7d631 100644
--- a/guide/english/computer-science/databases/relational-databases/index.md
+++ b/guide/english/computer-science/databases/relational-databases/index.md
@@ -98,7 +98,7 @@ This is just a brief intro into relational-databases. Below links are provided t
 
 #### More Information:
 * Relational databases on <a href='https://en.wikipedia.org/wiki/Relational_database' target='_blank' rel='nofollow'>wikipedia</a>
-* One-to-many on <a href='https://en.wikipedia.org/wiki/One-to-many_(data_model' target='_blank' rel='nofollow'>wikipedia</a>)
-* Many-to-many on <a href='https://en.wikipedia.org/wiki/Many-to-many_(data_model' target='_blank' rel='nofollow'>wikipedia</a>)
-* One-to-one on <a href='https://en.wikipedia.org/wiki/One-to-one_(data_model' target='_blank' rel='nofollow'>wikipedia</a>)
+* One-to-many on <a href='https://en.wikipedia.org/wiki/One-to-many_(data_model' target='_blank' rel='nofollow'>wikipedia</a>
+* Many-to-many on <a href='https://en.wikipedia.org/wiki/Many-to-many_(data_model' target='_blank' rel='nofollow'>wikipedia</a>
+* One-to-one on <a href='https://en.wikipedia.org/wiki/One-to-one_(data_model' target='_blank' rel='nofollow'>wikipedia</a>
 * Relationship model on <a href='https://en.wikipedia.org/wiki/Entity%E2%80%93relationship_model' target='_blank' rel='nofollow'>wikipedia</a>