Cita APA (7th ed.)

Meschkowski, H. (1966). Unsolved and unsolvable problems in geometry. F. Ungar Publishing.

Cita Chicago (17th ed.)

Meschkowski, Herbert. Unsolved and Unsolvable Problems in Geometry. New York: F. Ungar Publishing, 1966.

Cita MLA (9th ed.)

Meschkowski, Herbert. Unsolved and Unsolvable Problems in Geometry. F. Ungar Publishing, 1966.