Hammerton,Sir John. Practical knowledge for all. Waverley Book.
Cita Chicago (17th ed.)Hammerton,Sir John. Practical Knowledge for All. London: Waverley Book.
Cita MLA (9th ed.)Hammerton,Sir John. Practical Knowledge for All. Waverley Book.
Atenció: Aquestes cites poden no estar 100% correctes.