FRASEN ROBINSON JOHN. (1989). SECRETS OF EFFECTIVE DIRECT MAIL. MCGRAW-HILL.
Chicago Style (17. basım) AtıfFRASEN ROBINSON JOHN. SECRETS OF EFFECTIVE DIRECT MAIL. LONDON: MCGRAW-HILL, 1989.
MLA (9th ed.) AtıfFRASEN ROBINSON JOHN. SECRETS OF EFFECTIVE DIRECT MAIL. MCGRAW-HILL, 1989.
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