Style de citation APA

Buckley, E. A. (1961). How to increase sales with letters. McGraw Hill.

Style de citation Chicago

Buckley, Earle A. How to Increase Sales with Letters. McGraw Hill, 1961.

Style de citation MLA

Buckley, Earle A. How to Increase Sales with Letters. McGraw Hill, 1961.

Attention : ces citations peuvent ne pas être correctes à 100%.