Ling, D. (1978). Cumulative record of speech skill acquisition. Washington, D.C: Alexander Graham Bell.
استشهاد بنمط شيكاغوLing, Daniel. Cumulative Record of Speech Skill Acquisition. Washington, D.C: Alexander Graham Bell, 1978.
MLA استشهادLing, Daniel. Cumulative Record of Speech Skill Acquisition. Washington, D.C: Alexander Graham Bell, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.