APA aipamena

Lewis, J. P. (1959). Business conditions analysis. New York: McGraw-Hill.

Chicago Style aipamena

Lewis, John P. Business Conditions Analysis. New York: McGraw-Hill, 1959.

MLA aipamena

Lewis, John P. Business Conditions Analysis. New York: McGraw-Hill, 1959.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.