diff --git a/21.jhn/intro.md b/21.jhn/intro.md
index 997748d..30d86d5 100644
--- a/21.jhn/intro.md
+++ b/21.jhn/intro.md
@@ -2,7 +2,7 @@
 
 All four gospels record many of the same things that Jesus did and said. However, John explained more about why Jesus did these things. He wanted people to understand things about God. John also wanted people to know that God came to earth as a man named Jesus.
 
-See: Gospel; Jesus is God
+See: [Gospel](../articles/gospel.md); [Jesus is God](../articles/jesusisgod.md)
 
 ### Who wrote this book?
 
@@ -10,7 +10,7 @@ John, the disciple of Jesus, wrote this book. He did not write that he wrote thi
 
 See: Luke 9:54; Galatians 2:9
 
-See: Disciple; Gospel
+See: Disciple; [Gospel](../articles/gospel.md)
 
 ### Who did John write to?
 
@@ -20,7 +20,7 @@ However, John also wanted the Jews to learn about Jesus and to trust in him. He
 
 John’s gospel has helped Christians understand that Jesus is God. It has also helped them to know  that the Father, Son, and Holy Spirit are one God.
 
-See: Gospel; Gentile; Old Testament (Law and Prophets); Messiah (Christ); Jesus is God; Holy Spirit; Trinity
+See: [Gospel](../articles/gospel.md); Gentile; Old Testament (Law and Prophets); Messiah (Christ); [Jesus is God](../articles/jesusisgod.md); Holy Spirit; Trinity
 
 ### What did John write about in this book? 
 
@@ -28,7 +28,7 @@ In John’s gospel, there are seven times when someone asks Jesus who he is, and
 
 John also wrote more about the Holy Spirit than any other book in the Bible (see: John 14 and 16). He wanted people to know that the Holy Spirit works in new and different ways after Jesus died.
 
-See: Yahweh (I am); Gospel; Jesus is God; Holy Spirit
+See: Yahweh (I am); [Gospel](../articles/gospel.md); [Jesus is God](../articles/jesusisgod.md); Holy Spirit
 
 ### Why did John write this book?