Pilsworth, R. (1990). The smallest enemy: Understanding and avoiding infection. Grey Seal Books.
Citazione stile Chigago Style (17a edizione)Pilsworth, Roy. The Smallest Enemy: Understanding and Avoiding Infection. London: Grey Seal Books, 1990.
Citatione MLA (9a ed.)Pilsworth, Roy. The Smallest Enemy: Understanding and Avoiding Infection. Grey Seal Books, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.