Wong, N. L. (2009). The interpersonal aspect of help-seeking and help-providing texts: A systemic functional investigation into mood and modality.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Wong, Nyuk Lan. The Interpersonal Aspect of Help-seeking and Help-providing Texts: A Systemic Functional Investigation into Mood and Modality. 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Wong, Nyuk Lan. The Interpersonal Aspect of Help-seeking and Help-providing Texts: A Systemic Functional Investigation into Mood and Modality. 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.