APA (7th ed.) Citation

Forbes, R. J. (1950). Bibliographia antiqua. Philosophia naturalis (usque ad 1939). Lief. 6.

Chicago Style (17th ed.) Citation

Forbes, R. J. Bibliographia Antiqua. Philosophia Naturalis (usque Ad 1939). Lief. 6. Leiden, 1950.

MLA (8th ed.) Citation

Forbes, R. J. Bibliographia Antiqua. Philosophia Naturalis (usque Ad 1939). Lief. 6. 1950.

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