Huckfeldt, R. R., Kohfeld, C., & Likens, T. W. (1982). Dynamic modeling: An introduction. Sage.
Dyfyniad Arddull ChicagoHuckfeldt, R. Robert, C.W Kohfeld, and Thomas W. Likens. Dynamic Modeling: An Introduction. Newbury Park, Calif: Sage, 1982.
Dyfyniad MLAHuckfeldt, R. Robert, et al. Dynamic Modeling: An Introduction. Sage, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.