Ziefert, H. Sisters Are For Making Sand Castles. Puffin Books.
Cita Chicago (17th ed.)Ziefert, Harriet. Sisters Are For Making Sand Castles. Puffin Books.
Cita MLA (8th ed.)Ziefert, Harriet. Sisters Are For Making Sand Castles. Puffin Books.
Atenció: Aquestes cites poden no estar 100% correctes.