Orr, K., T., N., S., F.(1983).The world connection / Timothy Orr Knight; Editor: Frank N. Speights (Ed.ke-1, Cet.1).:Howard W. Sams n Co..
Gaya MLA
Knight, Timothy, Orr., Speights, Frank, N.."The world connection / Timothy Orr Knight; Editor: Frank N. Speights".Ed.ke-1, Cet.1:Howard W. Sams n Co.,1983.Textbook.