Cita APA (7th ed.)

Hultgren. Border Walls Gone Green. University of Minnesota Press.

Cita Chicago (17th ed.)

Hultgren. Border Walls Gone Green. University of Minnesota Press.

Cita MLA (9th ed.)

Hultgren. Border Walls Gone Green. University of Minnesota Press.

Atenció: Aquestes cites poden no estar 100% correctes.