Cita APA (7th ed.)
ebrary, Inc, & Crowley, P. (2005). Issues and practices. Morgan Kaufmann.
Cita Chicago (17th ed.)
ebrary, Inc, i Patrick Crowley. Issues and Practices. San Francisco: Morgan Kaufmann, 2005.
Cita MLA (9th ed.)
ebrary, Inc, i Patrick Crowley. Issues and Practices. Morgan Kaufmann, 2005.
Atenció: Aquestes cites poden no estar 100% correctes.