APA (7th ed.) Citation

Banks, S. J. E. (1930). The Importance of German as a Commercial Language. Periodicals Archive Online (PAO).

Chicago Style (17th ed.) Citation

Banks, S. J. E. The Importance of German as a Commercial Language. London: Periodicals Archive Online (PAO), 1930.

MLA (9th ed.) Citation

Banks, S. J. E. The Importance of German as a Commercial Language. Periodicals Archive Online (PAO), 1930.

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