Cita APA (7a ed.)

O'Brien, J. J. (1993). The historical and cultural heritage of the Bikol people (Third edition.). James J. O"Brien.

Cita Chicago Style (17a ed.)

O'Brien, James J. The Historical and Cultural Heritage of the Bikol People. Third edition. Manila: James J. O"Brien, 1993.

Cita MLA (9a ed.)

O'Brien, James J. The Historical and Cultural Heritage of the Bikol People. Third edition. James J. O"Brien, 1993.