Vermeer, P. A. (1980). Formulation and analysis of sand deformation problems.
Lua i Stíl Chicago (17ú heag.)Vermeer, Pieter Anne. Formulation and Analysis of Sand Deformation Problems. 1980.
Lua MLA (8ú heag.)Vermeer, Pieter Anne. Formulation and Analysis of Sand Deformation Problems. 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.