Meschkowski, H. (1966). Unsolved and unsolvable problems in geometry. F. Ungar Publishing.
Citazione stile Chigago Style (17a edizione)Meschkowski, Herbert. Unsolved and Unsolvable Problems in Geometry. New York: F. Ungar Publishing, 1966.
Citatione MLA (9a ed.)Meschkowski, Herbert. Unsolved and Unsolvable Problems in Geometry. F. Ungar Publishing, 1966.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.