Gaya APA

Sowers, G, B., Sowers, G, F. (1970). Introductory soil mechanics and foundations. (1970). : New York : Macmillan Publishing Co. Inc.,.

Gaya MLA

Sowers, George, B.., Sowers, George, F.. "Introductory soil mechanics and foundations.". 1970 : New York : Macmillan Publishing Co. Inc.,, 1970. Text.