Carlson, N. L. (2012). Life is fun. Carolrhoda Books.
Cita Chicago (17th ed.)Carlson, Nancy L. Life Is Fun. Minneapolis: Carolrhoda Books, 2012.
Cita MLA (8th ed.)Carlson, Nancy L. Life Is Fun. Carolrhoda Books, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.