Hobhouse, H. (1992). Seeds of change: five plants that transformed: Mankind. Papermac.
Citazione stile Chigago Style (17a edizione)Hobhouse, Henry. Seeds of Change: Five Plants That Transformed: Mankind. London: Papermac, 1992.
Citatione MLA (9a ed.)Hobhouse, Henry. Seeds of Change: Five Plants That Transformed: Mankind. Papermac, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.