Hall, R. A. (1966). New ways to learn a foreign languaje. Bantam books.
Cita Chicago (17th ed.)Hall, Robert A. New Ways to Learn a Foreign Languaje. New York: Bantam books, 1966.
Cita MLA (9th ed.)Hall, Robert A. New Ways to Learn a Foreign Languaje. Bantam books, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.