Kahn, C. H. (1964). Business and professional income under the personal income tax. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Kahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. [Princeton, N.J.]: Princeton University Press, 1964.
Lua MLA (9ú heag.)Kahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. Princeton University Press, 1964.