Gaya APA

Head, K, H. (2014). Manual of Soil Laboratory Testing, Volume I: Soil Classification and Compaction Tests (3). Scotland: Whittles Pubishing.

Gaya MLA

Head, K., H.. "Manual of Soil Laboratory Testing, Volume I: Soil Classification and Compaction Tests". 3 Scotland: Whittles Pubishing, 2014. Text.