APA

hughes j. h., . (1980). basic englineering mechanics. london: elbs & macmilan.

Chicago

hughes j h, . 1980. basic englineering mechanics. london: elbs & macmilan.

Harvard

hughes j. h., . (1980). basic englineering mechanics. london: elbs & macmilan.

MLA

hughes j h, . basic englineering mechanics. london: elbs & macmilan. 1980.