Littlejohn, . A. (2005). Company to company: A task-based approach to business emails, letters and faxes (Fourth edition.). Cambridge University Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Littlejohn, Andrew. Company to Company: A Task-based Approach to Business Emails, Letters and Faxes. Fourth edition. Cambridge: Cambridge University Press, 2005.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Littlejohn, Andrew. Company to Company: A Task-based Approach to Business Emails, Letters and Faxes. Fourth edition. Cambridge University Press, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.