Dyfyniad APA
Peck, R. B., Hanson, W. E., & Thornburn, T. H. (1974). Foundation engineering (2d ed.). Wiley.
Dyfyniad Arddull Chicago
Peck, Ralph B., Walter Edmund Hanson, and Thomas H. Thornburn. Foundation Engineering. 2d ed. New York: Wiley, 1974.
Dyfyniad MLA
Peck, Ralph B., et al. Foundation Engineering. 2d ed. Wiley, 1974.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.