APA (7th ed.) Zitazioa

LEWIS,John P. (1959). Business Conditions analysis.: Lewis, John P. Mcgraw-Hill.

Chicago Style (17th ed.) Zitazioa

LEWIS,John P. Business Conditions Analysis.: Lewis, John P. Newyork: Mcgraw-Hill, 1959.

MLA (9th ed.) Zitazioa

LEWIS,John P. Business Conditions Analysis.: Lewis, John P. Mcgraw-Hill, 1959.