APA

MORTELL A., . (1993). THE COURAGE TO FAIL: ART MORTELL'S SECRETS FOR BUSINESS SECCESS. NEW YORK: MCGRAW-HILL.

Chicago

MORTELL ART, . 1993. THE COURAGE TO FAIL: ART MORTELL'S SECRETS FOR BUSINESS SECCESS. NEW YORK: MCGRAW-HILL.

Harvard

MORTELL A., . (1993). THE COURAGE TO FAIL: ART MORTELL'S SECRETS FOR BUSINESS SECCESS. NEW YORK: MCGRAW-HILL.

MLA

MORTELL ART, . THE COURAGE TO FAIL: ART MORTELL'S SECRETS FOR BUSINESS SECCESS. NEW YORK: MCGRAW-HILL. 1993.