APA

Hill C. W., .Global business today. New Yorki: Irwin Mc Graw Hill.

Chicago

Hill Charles W.L, .Global business today. New Yorki: Irwin Mc Graw Hill.

Harvard

Hill C. W., .Global business today. New Yorki: Irwin Mc Graw Hill.

MLA

Hill Charles W.L, .New Yorki: Irwin Mc Graw Hill. .