Huckfeldt, R. R., Kohfeld, C., & Likens, T. W. (1982). Dynamic modeling: An introduction. Sage.
Lua i Stíl Chicago (17ú heag.)Huckfeldt, R. Robert, C.W Kohfeld, agus Thomas W. Likens. Dynamic Modeling: An Introduction. Newbury Park, Calif: Sage, 1982.
Lua MLA (9ú heag.)Huckfeldt, R. Robert, et al. Dynamic Modeling: An Introduction. Sage, 1982.
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