Gartside, L. (1976). Modern business correspondence : a practical: Course for use in schools, and by all who would write better business letters. The English language book society.
Citazione stile Chigago Style (17a edizione)Gartside, L. Modern Business Correspondence : A Practical: Course for Use in Schools, and by All Who Would Write Better Business Letters. London: The English language book society, 1976.
Citatione MLA (9a ed.)Gartside, L. Modern Business Correspondence : A Practical: Course for Use in Schools, and by All Who Would Write Better Business Letters. The English language book society, 1976.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.