Norman Bridwell. (2011). Clifford's Birthday Party (Clifford 8x8) (Reissue.). Cartwheel Books.
Cita Chicago (17th ed.)Norman Bridwell. Clifford's Birthday Party (Clifford 8x8). Reissue. Cartwheel Books, 2011.
Cita MLA (9th ed.)Norman Bridwell. Clifford's Birthday Party (Clifford 8x8). Reissue. Cartwheel Books, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.