Dyfyniad APA
Bowles, J. E. (1984). Physical and geotechnical properties of soils (2 nd ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Bowles, Joseph E. Physical and Geotechnical Properties of Soils. 2 nd ed. New York: McGraw-Hill, 1984.
Dyfyniad MLA
Bowles, Joseph E. Physical and Geotechnical Properties of Soils. 2 nd ed. McGraw-Hill, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.