APA (7th ed.) Citation

Betten, F. S. (1909). The Roman Index of forbidden books. B. Herder; [etc., etc.].

Chicago Style (17th ed.) Citation

Betten, Francis Sales. The Roman Index of Forbidden Books. B. Herder; [etc., etc.], 1909.

MLA (8th ed.) Citation

Betten, Francis Sales. The Roman Index of Forbidden Books. B. Herder; [etc., etc.], 1909.

Warning: These citations may not always be 100% accurate.