APA সাইটেশন

Porterfield, J. D. Community Health in United in the United states. Voice of America.

শিকাগো স্টাইলে সাইটেশন

Porterfield, John D. Community Health in United in the United States. New York: Voice of America.

এমএলএ সাইটেশন

Porterfield, John D. Community Health in United in the United States. Voice of America.