APA
Leonards G. A., . (1962). Foundation Engineering. \N: McGraw Hill.
Chicago
Leonards G A, . 1962. Foundation Engineering. \N: McGraw Hill.
Harvard
Leonards G. A., . (1962). Foundation Engineering. \N: McGraw Hill.
MLA
Leonards G A, . Foundation Engineering. \N: McGraw Hill. 1962.