توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Lavin, H. (1980). How to get-and keep!-good industrial customers through effective direct mail: A guidebook for small manufacturers, distributors, and independent representatives. Exposition Press.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Lavin, Henry. How to Get-and Keep!-good Industrial Customers Through Effective Direct Mail: A Guidebook for Small Manufacturers, Distributors, and Independent Representatives. Smithtown, N.Y: Exposition Press, 1980.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Lavin, Henry. How to Get-and Keep!-good Industrial Customers Through Effective Direct Mail: A Guidebook for Small Manufacturers, Distributors, and Independent Representatives. Exposition Press, 1980.