APA (7th ed.) Citation

Ludvigsen, K. E. (2012). Porsche: Origin of the species. Bentley Publishers.

Chicago Style (17th ed.) Citation

Ludvigsen, Karl E. Porsche: Origin of the Species. Cambridge, MA: Bentley Publishers, 2012.

MLA (9th ed.) Citation

Ludvigsen, Karl E. Porsche: Origin of the Species. Bentley Publishers, 2012.