Buol, S. S., Southard, R. R., Graham, R. R., & McDaniel, P. P. (2003). Soil genesis and classification (fifth edition.).
Lua i Stíl Chicago (17ú heag.)Buol, S.W. Stanley, R.J. Randal Southard, R.C. Robert Graham, agus P.A. Paul McDaniel. Soil Genesis and Classification. fifth edition. 2003.
Lua MLA (9ú heag.)Buol, S.W. Stanley, et al. Soil Genesis and Classification. fifth edition. 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.