Gaya APA

Byrns, R, T., Stone, G, W. (1984). Economics- (2nd.ed.). Glenview, ill.: Scott, Foresman and Co..

Gaya MLA

Byrns, Ralph, T., Stone, Gerald, W.. "Economics-". 2nd.ed. Glenview, ill.: Scott, Foresman and Co., 1984. Text.