Dyfyniad APA
Duncan, J. M., Wright, S. G., & Brandon, T. L. (2014). Soil strength and slope stability (Second edition.). Wiley.
Dyfyniad Arddull Chicago
Duncan, J. M., Stephen G. Wright, and Thomas L. Brandon. Soil Strength and Slope Stability. Second edition. Hoboken, New Jersey: Wiley, 2014.
Dyfyniad MLA
Duncan, J. M., et al. Soil Strength and Slope Stability. Second edition. Wiley, 2014.
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