APA

Bell F. G., Bell F. G., . (1981). Engineering properties of soils and rocks. London [u.a.]: Butterworths.

Chicago

Bell Fred G, Bell Frederick Gladstone, . 1981. Engineering properties of soils and rocks. London [u.a.]: Butterworths.

Harvard

Bell F. G., Bell F. G., . (1981). Engineering properties of soils and rocks. London [u.a.]: Butterworths.

MLA

Bell Fred G, Bell Frederick Gladstone, . Engineering properties of soils and rocks. London [u.a.]: Butterworths. 1981.