APA Style

Bagehot, W. (2003). Physics and Politics, or, Thoughts on the application of the principles of "natural selection" and "inheritance" to political society (Cet. 1). United States of America: Project Gutenberg.

MLA Style

Bagehot, Walter. "Physics and Politics, or, Thoughts on the application of the principles of "natural selection" and "inheritance" to political society". Cet. 1 United States of America: Project Gutenberg, 2003. Computer File.