ROLLINGS, M., & ROLLINGS, M. (1996). Geo Technical Materials In Construction Marian P. Rollings And Raymond S. Rolling And Raymonds Rollings. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)ROLLINGS, Marian, agus Marian ROLLINGS. Geo Technical Materials In Construction Marian P. Rollings And Raymond S. Rolling And Raymonds Rollings. McGraw-Hill, 1996.
Lua MLA (8ú heag.)ROLLINGS, Marian, agus Marian ROLLINGS. Geo Technical Materials In Construction Marian P. Rollings And Raymond S. Rolling And Raymonds Rollings. McGraw-Hill, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.