Dyfyniad APA

BOELES, J. E., & Bowles , J. E. (1980). Structural Steel Design Joseph E. Bowles. McGraw-Hill.

Dyfyniad Arddull Chicago

BOELES, Joseph E., and Joseph E. Bowles. Structural Steel Design Joseph E. Bowles. McGraw-Hill, 1980.

Dyfyniad MLA

BOELES, Joseph E., and Joseph E. Bowles. Structural Steel Design Joseph E. Bowles. McGraw-Hill, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.