Citazione Stile APA (7a Edizione)

Zopf, P. E. (1974). A demographic and occupational profile of State Planning Region G Chapel Hill.

Citazione stile Chigago Style (17a edizione)

Zopf, Paul E. A Demographic and Occupational Profile of State Planning Region G Chapel Hill. North Carolina, 1974.

Citatione MLA (9a ed.)

Zopf, Paul E. A Demographic and Occupational Profile of State Planning Region G Chapel Hill. 1974.