APA (7th ed.) Citation

Walls, L. D. (2009). The passage to cosmos Alexander von Humboldt and the shaping of America / Laura Dassow Walls: Alexander von Humboldt and the shaping of America. University of Chicago Press.

Chicago Style (17th ed.) Citation

Walls, Laura Dassow. The Passage to Cosmos Alexander Von Humboldt and the Shaping of America / Laura Dassow Walls: Alexander Von Humboldt and the Shaping of America. Chicago: University of Chicago Press, 2009.

MLA (9th ed.) Citation

Walls, Laura Dassow. The Passage to Cosmos Alexander Von Humboldt and the Shaping of America / Laura Dassow Walls: Alexander Von Humboldt and the Shaping of America. University of Chicago Press, 2009.

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