APA
Hibbeler R.C, . (1991). Mechanics of materials. : N York macmillan pub comp inc.
Chicago
Hibbeler R.C, . 1991. Mechanics of materials. : N York macmillan pub comp inc.
Harvard
Hibbeler R.C, . (1991). Mechanics of materials. : N York macmillan pub comp inc.
MLA
Hibbeler R.C, . Mechanics of materials. : N York macmillan pub comp inc. 1991.