Heesterman, A. R. G. (1972). Forecasting models for national economic planning (2nd ed.). Reidel.
Lua i Stíl Chicago (17ú heag.)Heesterman, A. R. G. Forecasting Models for National Economic Planning. 2nd ed. Dordrecht: Reidel, 1972.
Lua MLA (9ú heag.)Heesterman, A. R. G. Forecasting Models for National Economic Planning. 2nd ed. Reidel, 1972.