Bargen, B. (1934). Tabulation technique: A summary of the column-center principle underlying correct arrangement of columnar typing. The Gregg Pub. Co..
Lua i Stíl Chicago (17ú heag.)Bargen, Bernhard. Tabulation Technique: A Summary of the Column-center Principle Underlying Correct Arrangement of Columnar Typing. New York : Chicago [etc.]: The Gregg Pub. Co., 1934.
Lua MLA (8ú heag.)Bargen, Bernhard. Tabulation Technique: A Summary of the Column-center Principle Underlying Correct Arrangement of Columnar Typing. The Gregg Pub. Co., 1934.
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