Trumbull, H. C. Hints on Child-Training. Hardpress Publishing.
Cita Chicago (17th ed.)Trumbull, H. Clay. Hints on Child-Training. Hardpress Publishing.
Cita MLA (8th ed.)Trumbull, H. Clay. Hints on Child-Training. Hardpress Publishing.
Atenció: Aquestes cites poden no estar 100% correctes.