What books or materials are needed to understand primitive roots?

[mathstudent1]

do you know any books, videos, or notes that can help me to understand these topics:
1-primitive roots for primes
2-the existence of primitive roots
I am using right now elementary number theory and its application by Kenneth H. Rosen to understand these topics, do you know another source that can help me?

 

[martinbn]

do you know any books, videos, or notes that can help me to understand these topics:
1-primitive roots for primes
2-the existence of primitive roots
I am using right now elementary number theory and its application by Kenneth H. Rosen to understand these topics, do you know another source that can help me?

This one is quite good. Why do you need another one? In any case most introductory number theory or algebra books would have that. Look through some to find one that has style that suits you.