توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Gartside, L. (1986). Modern business correspondence: A practical course for use in schools, and by all who would ... (4th ed.). Macdonald and Evans.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Gartside, L. Modern Business Correspondence: A Practical Course for Use in Schools, and by All Who Would ... 4th ed. London: Macdonald and Evans, 1986.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

Gartside, L. Modern Business Correspondence: A Practical Course for Use in Schools, and by All Who Would ... 4th ed. Macdonald and Evans, 1986.