Berenstain, J. Berenstain Bears All Aboard! Harpercollins.
Cita Chicago (17th ed.)Berenstain, Jan. Berenstain Bears All Aboard! Harpercollins.
Cita MLA (8th ed.)Berenstain, Jan. Berenstain Bears All Aboard! Harpercollins.
Atenció: Aquestes cites poden no estar 100% correctes.