Dyfyniad APA
Bowles, J. E. (1997). Foundation analysis and design (5th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Bowles, Joseph E. Foundation Analysis and Design. 5th ed. New Delhi: McGraw-Hill, 1997.
Dyfyniad MLA
Bowles, Joseph E. Foundation Analysis and Design. 5th ed. McGraw-Hill, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.