Cita APA (7th ed.)

Duncan, J. M., & Wright, S. G. (2005). Soil strength and slope stability (1a. ed.). John Wiley and Sons.

Cita Chicago (17th ed.)

Duncan, J. Michael, i Stephen G. Wright. Soil Strength and Slope Stability. 1a. ed. Hoboken: John Wiley and Sons, 2005.

Cita MLA (9th ed.)

Duncan, J. Michael, i Stephen G. Wright. Soil Strength and Slope Stability. 1a. ed. John Wiley and Sons, 2005.