Cita APA (7a ed.)

Blewett, J. E. (1976). Directorium Historicorum S.I: Of the historians = de los historiadores = des historiens. International Center for Jesuit Education.

Cita Chicago Style (17a ed.)

Blewett, John E. Directorium Historicorum S.I: Of the Historians = De Los Historiadores = Des Historiens. Roma: International Center for Jesuit Education, 1976.

Cita MLA (9a ed.)

Blewett, John E. Directorium Historicorum S.I: Of the Historians = De Los Historiadores = Des Historiens. International Center for Jesuit Education, 1976.