Bouwens, C.
English Commercial correspondence
Persatuan Tenaga, 1957
 Buku Teks
Bowman, Joel P.
Effective business correspondence
Harper & Row Publishers, 1979
 Buku Referensi
Keenan, John
Feel free to write : guide for business and professional people / John Keenan
John Wiley & Sons, 1982
 Buku Teks
Aurner, Robert Ray
Manual for effective business correspondence / Robert Ray Aurner
South-Western Publishing Company, 1939
 Buku Teks
Sigband, Norman B.
Effective report writing, for business, industry, and government / Norman B. Sigband
Harper & Brothers Publ , 1960
 Buku Teks