Citazione Stile APA (7a Edizione)

Shurter, R. (1982). Effective letters in business. Tata Mc Graw Hill.

Citazione stile Chigago Style (17a edizione)

Shurter, Robert. Effective Letters in Business. New Delhi: Tata Mc Graw Hill, 1982.

Citatione MLA (9a ed.)

Shurter, Robert. Effective Letters in Business. Tata Mc Graw Hill, 1982.