Cita APA (7a ed.)

Celko, J. (2004). Joe Celko's Trees and hierarchies in SQL for smarties (1st edition.). Morgan Kaufmann.

Cita Chicago Style (17a ed.)

Celko, Joe. Joe Celko's Trees and Hierarchies in SQL for Smarties. 1st edition. Amsterdam ; Boston: Morgan Kaufmann, 2004.

Cita MLA (9a ed.)

Celko, Joe. Joe Celko's Trees and Hierarchies in SQL for Smarties. 1st edition. Morgan Kaufmann, 2004.