SAMUELSON, P. A. (1967). Economics: Pengantar uraian II. Vivia Study Club.
Lua i Stíl Chicago (17ú heag.)SAMUELSON, Paul A. Economics: Pengantar Uraian II. Jakarta: Vivia Study Club, 1967.
Lua MLA (9ú heag.)SAMUELSON, Paul A. Economics: Pengantar Uraian II. Vivia Study Club, 1967.
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