Cita APA (7a ed.)

Eckstein, R. (1999). XML pocket reference. O'Reilly.

Cita Chicago Style (17a ed.)

Eckstein, Robert. XML Pocket Reference. Beijing [etc.]: O'Reilly, 1999.

Cita MLA (9a ed.)

Eckstein, Robert. XML Pocket Reference. O'Reilly, 1999.