Foresman, L., F. et al.(1990).Mathematics for business / Stanley A. Salzman, Charles D. Miller, Louis F. Haelzle (Ed.ke-4).:Harper Collins Publisher.
Gaya MLA
Foresman, Louis, F.. et al."Mathematics for business / Stanley A. Salzman, Charles D. Miller, Louis F. Haelzle".Ed.ke-4:Harper Collins Publisher,1990.Textbook.