Não informado. (2007). Marketing letters. Kluwer Academic Publishers.
Style de citation Chicago (17e éd.)Não informado. Marketing Letters. Dordrecht, Holanda: Kluwer Academic Publishers, 2007.
Style de citation MLA (8e éd.)Não informado. Marketing Letters. Kluwer Academic Publishers, 2007.
Attention : ces citations peuvent ne pas être correctes à 100%.