Cita APA (7th ed.)

Celko, J. (2012). Joe Celko's Trees and hierarchies in SQL for smarties (Second edition.). Elsevier/Morgan Kaufmann.

Cita Chicago (17th ed.)

Celko, Joe. Joe Celko's Trees and Hierarchies in SQL for Smarties. Second edition. Amsterdam ; Boston: Elsevier/Morgan Kaufmann, 2012.

Cita MLA (9th ed.)

Celko, Joe. Joe Celko's Trees and Hierarchies in SQL for Smarties. Second edition. Elsevier/Morgan Kaufmann, 2012.