The AMA handbook of business lettersJeffrey L. Seglin · First published 1989 · Latest edition 2012Open the Tome
The Bankers Handbook of Letter and Letter WritingJeffrey L. Seglin · First published 1992Open the Tome
Curso De Mercadotecnia McGraw-Hill 36 Horas/the McGraw-Hill 36-Hour Marketing CourseJeffrey L. Seglin · First published 1991Open the Tome