Kahn, C. H. (1964). Business and professional income under the personal income tax. Princeton University Press.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিKahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. [Princeton, N.J.]: Princeton University Press, 1964.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিKahn, Charles Harry. Business and Professional Income Under the Personal Income Tax. Princeton University Press, 1964.