Gaya APA

Smith, G, N., Smith, I, G. (1998). Elements of soil mehancs / G.N. Smith, Ian G.N. Smith (Seventh Edition). Oxford: lackwell Science.

Gaya MLA

Smith, G., N.., Smith, Ian, G.N.. "Elements of soil mehancs / G.N. Smith, Ian G.N. Smith". Seventh Edition Oxford: lackwell Science, 1998. .