APA-ийн эшлэл(7 дахь хэвлэлт)

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.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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.

MLA -ийн эшлэл (9 дэх хэвлэлт)

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.