Crum, W. L., & Patton, A. C. (1925). An introduction to the methods of economic statistics. A. W. Shaw.
Lua i Stíl Chicago (17ú heag.)Crum, William Leonard, agus Alson Currie Patton. An Introduction to the Methods of Economic Statistics. Chicago: A. W. Shaw, 1925.
Lua MLA (9ú heag.)Crum, William Leonard, agus Alson Currie Patton. An Introduction to the Methods of Economic Statistics. A. W. Shaw, 1925.
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