Gaya APA
O'Brien, R, A, G, G. (1971).
Mathematics For Economists and Social Scientists .
London:
New York : Macmillan Publishing Co.,.
Gaya MLA
O'Brien, RJ, And, Garcia,, GG.
"Mathematics For Economists and Social Scientists".
London:
New York : Macmillan Publishing Co.,,
1971.
Text.