Hawksworth, D. L., & Ritchie, J. M. (1993). Biodivesity and biosystematic priorities: Mictoorganisms and invertebrates : priorities for biosystematic research in support of biodiversity in developing countries: microorganisms and invertabrates. Cab International.
Παραπομπή σε μορφή Chicago (17η εκδ.)Hawksworth, D. L., και J. Mark Ritchie. Biodivesity and Biosystematic Priorities: Mictoorganisms and Invertebrates : Priorities for Biosystematic Research in Support of Biodiversity in Developing Countries: Microorganisms and Invertabrates. Oxon, UK: Cab International, 1993.
Παραπομπή σε μορφή MLA (9th εκδ.)Hawksworth, D. L., και J. Mark Ritchie. Biodivesity and Biosystematic Priorities: Mictoorganisms and Invertebrates : Priorities for Biosystematic Research in Support of Biodiversity in Developing Countries: Microorganisms and Invertabrates. Cab International, 1993.