APA (7th ed.) Citation

Vopěnka, P., & Hájek, P. (1972). The theory of semisets. North-Holland Pub. Co..

Chicago Style (17th ed.) Citation

Vopěnka, Petr, and Petr Hájek. The Theory of Semisets. Amsterdam: North-Holland Pub. Co., 1972.

MLA (9th ed.) Citation

Vopěnka, Petr, and Petr Hájek. The Theory of Semisets. North-Holland Pub. Co., 1972.

Warning: These citations may not always be 100% accurate.