Kahn, C. H. (1964). Business and professional income under the personal income tax. Princeton University Press.
Παραπομπή σε μορφή Chicago (17η εκδ.)Kahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. [Princeton, N.J.]: Princeton University Press, 1964.
Παραπομπή σε μορφή MLA (9th εκδ.)Kahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. Princeton University Press, 1964.