Dyfyniad APA
Bowles, J. E. (1988). Foundation analysis and design (4th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Bowles, Joseph E. Foundation Analysis and Design. 4th ed. New York: McGraw-Hill, 1988.
Dyfyniad MLA
Bowles, Joseph E. Foundation Analysis and Design. 4th ed. McGraw-Hill, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.