Gaya APA

Armstrong, G, W, S, ;, W, S, P, ;, C, P. (1985). Basic statistics in business and economics (ed. 4). California: WADSWORTH COMPANY.

Gaya MLA

Armstrong, George, W., Summers, ;, William, S., Peters, ;, Charles, P.. "Basic statistics in business and economics". ed. 4 California: WADSWORTH COMPANY, 1985. Text.