APA-referens (7:e uppl.)

Houlsby, G., Wroth, C., & Eisenstein, Z. (1983). Direct solution of plasticity problems in soils by the method of characteristics. Balkema.

Chicago-referens (17:e uppl.)

Houlsby, G., C. Wroth, och Z. Eisenstein. Direct Solution of Plasticity Problems in Soils by the Method of Characteristics. Balkema, 1983.

MLA-referens (9:e uppl.)

Houlsby, G., et al. Direct Solution of Plasticity Problems in Soils by the Method of Characteristics. Balkema, 1983.