Cita APA (7th ed.)

Erskine, F. M. (1906). Modern business correspondence: A practical treatise on the writing of business letters including many exercises in word study, synonyms, AD writing, punctuation, etc. The Bobbs-Merrill Company.

Cita Chicago (17th ed.)

Erskine, Frank Merrill. Modern Business Correspondence: A Practical Treatise on the Writing of Business Letters Including Many Exercises in Word Study, Synonyms, AD Writing, Punctuation, Etc. Indianapolis: The Bobbs-Merrill Company, 1906.

Cita MLA (9th ed.)

Erskine, Frank Merrill. Modern Business Correspondence: A Practical Treatise on the Writing of Business Letters Including Many Exercises in Word Study, Synonyms, AD Writing, Punctuation, Etc. The Bobbs-Merrill Company, 1906.