TRANTHAM, C. R., & PEDERSEN, J. K. (1976). Normal language developmant: The key to diagnosis andtherapy for language-desorded children. The Williams and Wilkins Co.

TRANTHAM, Carla Ross, and Joan K. PEDERSEN. Normal Language Developmant: The Key to Diagnosis Andtherapy for Language-desorded Children. Baltimore: The Williams and Wilkins Co, 1976.

TRANTHAM, Carla Ross, and Joan K. PEDERSEN. Normal Language Developmant: The Key to Diagnosis Andtherapy for Language-desorded Children. The Williams and Wilkins Co, 1976.