SpringerLink (Online service), Lepper, M. J. C. D., Scholten, H. J., & Stern, R. M. (1995). The Added Value of Geographical Information Systems in Public and Environmental Health. Springer Netherlands.
Παραπομπή σε μορφή Chicago (17η εκδ.)SpringerLink (Online service), Marion J. C. De Lepper, Henk J. Scholten, και Richard M. Stern. The Added Value of Geographical Information Systems in Public and Environmental Health. Dordrecht: Springer Netherlands, 1995.
Παραπομπή σε μορφή MLA (8th εκδ.)SpringerLink (Online service), et al. The Added Value of Geographical Information Systems in Public and Environmental Health. Springer Netherlands, 1995.
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