OSTASZEWSKI, A. (1993). Mathematics In Economecs Models And Methods Adam Ostaszewski. Blackwell.
Lua i Stíl Chicago (17ú heag.)OSTASZEWSKI, Adam. Mathematics In Economecs Models And Methods Adam Ostaszewski. Blackwell, 1993.
Lua MLA (8ú heag.)OSTASZEWSKI, Adam. Mathematics In Economecs Models And Methods Adam Ostaszewski. Blackwell, 1993.
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