Gaya APA

Chapman, O, L. (1947). Water Levels and Artesian Pressure in Observation Weels in The United States in 1947 Part 3. nort-Central States . : United States Goverment Printing Office.

Gaya MLA

Chapman, Oscar, L.. "Water Levels and Artesian Pressure in Observation Weels in The United States in 1947 Part 3. nort-Central States". : United States Goverment Printing Office, 1947. Text.