Cita APA (7th ed.)

Duncan, J. M., Wright, S. G., & Brandon, T. L. (2014). Soil strength and slope stability (2a. ed.). John Wiley and Sons, Inc.

Cita Chicago (17th ed.)

Duncan, J. Michael, Stephen G. Wright, i Thomas L. Brandon. Soil Strength and Slope Stability. 2a. ed. Hoboken: John Wiley and Sons, Inc, 2014.

Cita MLA (9th ed.)

Duncan, J. Michael, et al. Soil Strength and Slope Stability. 2a. ed. John Wiley and Sons, Inc, 2014.