Bickel, O. J., & Kuesel, T. (1982). Tunnel Engineering Handbook. Van Nostrand Reinhold Company.
Chicago Style aipamenaBickel, O. John, and T.R Kuesel. Tunnel Engineering Handbook. New York: Van Nostrand Reinhold Company, 1982.
MLA aipamenaBickel, O. John, and T.R Kuesel. Tunnel Engineering Handbook. Van Nostrand Reinhold Company, 1982.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.