Gaya APA

Sanglerat, G., Swanson, C, P. (1972). The penetrometer and soil exploration interpretation of penetration ì diagrams-theory and practice . Amsterdam: Amsterdam: Elsevier; 1972.

Gaya MLA

Sanglerat, G.., Swanson, Carl, P.. "The penetrometer and soil exploration interpretation of penetration ì diagrams-theory and practice". Amsterdam: Amsterdam: Elsevier; 1972, 1972. Text.