APA

Nelson H. D., American University Washington D., . (1983). Poland, a country study. Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O.

Chicago

Nelson Harold D, American University Washington D.C, . 1983. Poland, a country study. Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O.

Harvard

Nelson H. D., American University Washington D., . (1983). Poland, a country study. Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O.

MLA

Nelson Harold D, American University Washington D.C, . Poland, a country study. Washington, D.C: For sale by the Supt. of Docs., U.S. G.P.O. 1983.