Cita APA (7a ed.)

Bierer, D. (2015). Learning Doctrine: Object relational mapping (ORM) and database abstraction for PHP. O'Reilly.

Cita Chicago Style (17a ed.)

Bierer, Doug. Learning Doctrine: Object Relational Mapping (ORM) and Database Abstraction for PHP. [Place of publication not identified]: O'Reilly, 2015.

Cita MLA (8a ed.)

Bierer, Doug. Learning Doctrine: Object Relational Mapping (ORM) and Database Abstraction for PHP. O'Reilly, 2015.