APA (7th ed.) Citation

Cowles Commission for Research in Economics & Cowles, A. (1938). Common-stock indexes, 1871-1937. Principia press, inc..

Chicago Style (17th ed.) Citation

Cowles Commission for Research in Economics and Alfred Cowles. Common-stock Indexes, 1871-1937. Bloomington, Ind.: Principia press, inc., 1938.

MLA (9th ed.) Citation

Cowles Commission for Research in Economics and Alfred Cowles. Common-stock Indexes, 1871-1937. Principia press, inc., 1938.