APA (7th ed.) Citation

Gat, A. (2002). Why city-states existed? Riddles and clues of urbanisation and fortifications.

Chicago Style (17th ed.) Citation

Gat, A. Why City-states Existed? Riddles and Clues of Urbanisation and Fortifications. 2002.

MLA (9th ed.) Citation

Gat, A. Why City-states Existed? Riddles and Clues of Urbanisation and Fortifications. 2002.

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