Ling, D. (1978). Cumulative record of speech skill acquisition. Washington, D.C: Alexander Graham Bell.
Trích dẫn kiểu ChicagoLing, Daniel. Cumulative Record of Speech Skill Acquisition. Washington, D.C: Alexander Graham Bell, 1978.
MLA citiranjeLing, Daniel. Cumulative Record of Speech Skill Acquisition. Washington, D.C: Alexander Graham Bell, 1978.
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