APA
Christian A.J, . (1981). Management Machines and Methods in Civil Engineering. New york: John Wiley & Sons ,New York.
Chicago
Christian A.J, . 1981. Management Machines and Methods in Civil Engineering. New york: John Wiley & Sons ,New York.
Harvard
Christian A.J, . (1981). Management Machines and Methods in Civil Engineering. New york: John Wiley & Sons ,New York.
MLA
Christian A.J, . Management Machines and Methods in Civil Engineering. New york: John Wiley & Sons ,New York. 1981.