I am a U.S. citizen : how do I get proof of my U.S. citizenship?

Bibliographic Details
Format: Government Document eBook
Language:English
Published: [Washington, D.C.] : U.S. Citizenship and Immigration Services, 2013.
Subjects:
Online Access:https://purl.fdlp.gov/GPO/gpo77379
Description
Item Description:"A4."
"M-560B (October 2013) N."
"How do I customer guides"--Publisher website.
Physical Description:1 online resource (2 pages) : color illustration