APA (7th ed.) Citation

Rasiowa, H., & Sikorski, R. (1968). The mathematics of metamathematics (2., rev. ed.). Polish Scientific Publ.

Chicago Style (17th ed.) Citation

Rasiowa, Helena, and Roman Sikorski. The Mathematics of Metamathematics. 2., rev. ed. Warszawa: Polish Scientific Publ, 1968.

MLA (9th ed.) Citation

Rasiowa, Helena, and Roman Sikorski. The Mathematics of Metamathematics. 2., rev. ed. Polish Scientific Publ, 1968.