Cita APA (7th ed.)
Twain, M. (2001). What is man? and other essays of Mark Twain. Infomotions, Inc. ; Project Gutenburg.
Cita Chicago (17th ed.)
Twain, Mark. What Is Man? and Other Essays of Mark Twain. [South Bend, IN] : [Salt Lake City, Utah]: Infomotions, Inc. ; Project Gutenburg, 2001.
Cita MLA (9th ed.)
Twain, Mark. What Is Man? and Other Essays of Mark Twain. Infomotions, Inc. ; Project Gutenburg, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.