British Library. Science Reference and Information Service & Van Dulken, S. (1990). Introduction to patents information. Patents Information, Science Reference and Information Services.
Citazione stile Chigago Style (17a edizione)British Library. Science Reference and Information Service e Stephen Van Dulken. Introduction to Patents Information. London: Patents Information, Science Reference and Information Services, 1990.
Citatione MLA (8a ed.)British Library. Science Reference and Information Service e Stephen Van Dulken. Introduction to Patents Information. Patents Information, Science Reference and Information Services, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.