Peirce, N. R., & Hagstrom, J. (1983). The book of America: Inside 50 states today / Neal R. Peirce and Jerry Hagstrom. Norton.
Cita Chicago (17th ed.)Peirce, Neal R., i Jerry Hagstrom. The Book of America: Inside 50 States Today / Neal R. Peirce and Jerry Hagstrom. New York: Norton, 1983.
Cita MLA (8th ed.)Peirce, Neal R., i Jerry Hagstrom. The Book of America: Inside 50 States Today / Neal R. Peirce and Jerry Hagstrom. Norton, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.