Seltzer, E. Comment: Megaregions and nations. Town Planning Review.
Cita Chicago (17th ed.)Seltzer, Ethan. "Comment: Megaregions and Nations." Town Planning Review .
Cita MLA (9th ed.)Seltzer, Ethan. "Comment: Megaregions and Nations." Town Planning Review, .
Atenció: Aquestes cites poden no estar 100% correctes.