APA
Graig R. . F., . (1989). Soil Mechanics. london: van nostrand reinhold international.
Chicago
Graig R F, . 1989. Soil Mechanics. london: van nostrand reinhold international.
Harvard
Graig R. . F., . (1989). Soil Mechanics. london: van nostrand reinhold international.
MLA
Graig R F, . Soil Mechanics. london: van nostrand reinhold international. 1989.