APA (7th ed.) Citation

Helpman, E. (1998). The size of regions. [s.n.].

Chicago Style (17th ed.) Citation

Helpman, Elhanan. The Size of Regions. [S.l.]: [s.n.], 1998.

MLA (9th ed.) Citation

Helpman, Elhanan. The Size of Regions. [s.n.], 1998.

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