COVEN, W. (2012). HEIDI HECKELBECK AND THE CHRISTMAS SURPRISE # 9. LITTLE SIMON.
Cita Chicago (17th ed.)COVEN, WANDA. HEIDI HECKELBECK AND THE CHRISTMAS SURPRISE # 9. NEW YORK: LITTLE SIMON, 2012.
Cita MLA (9th ed.)COVEN, WANDA. HEIDI HECKELBECK AND THE CHRISTMAS SURPRISE # 9. LITTLE SIMON, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.