APA
                    Randall M German, . (1998). Powder Mettallurgy of Iron and Steel. New York: John Wiley & Sons ,New York.
                
                    Chicago
                    Randall M German, . 1998. Powder Mettallurgy of Iron and Steel. New York: John Wiley & Sons ,New York.
                
                    Harvard
                    Randall M German, . (1998). Powder Mettallurgy of Iron and Steel. New York: John Wiley & Sons ,New York.
                
                    MLA
                    Randall M German, . Powder Mettallurgy of Iron and Steel. New York: John Wiley & Sons ,New York. 1998.