APA (7th ed.) Citation

Fukuyama, F., & Pyka, J. Trzy regiony.

Chicago Style (17th ed.) Citation

Fukuyama, Francis, and Jan Pyka. Trzy Regiony.

MLA (9th ed.) Citation

Fukuyama, Francis, and Jan Pyka. Trzy Regiony.

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