Dyfyniad APA

Bickel, O. J., & Kuesel, T. (1982). Tunnel Engineering Handbook. Van Nostrand Reinhold Company.

Dyfyniad Arddull Chicago

Bickel, O. John, and T.R Kuesel. Tunnel Engineering Handbook. New York: Van Nostrand Reinhold Company, 1982.

Dyfyniad MLA

Bickel, O. John, and T.R Kuesel. Tunnel Engineering Handbook. Van Nostrand Reinhold Company, 1982.

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