Hills, M. (1988). Curing coughs, colds and flu: The drug-free way. Sheldon Press.
Citazione stile Chigago Style (17a edizione)Hills, Margaret. Curing Coughs, Colds and Flu: The Drug-free Way. London: Sheldon Press, 1988.
Citatione MLA (9a ed.)Hills, Margaret. Curing Coughs, Colds and Flu: The Drug-free Way. Sheldon Press, 1988.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.