Northern, J. L., & Downs, M. P. (1991). Hearing in children (4th edition.). Williams & Wilkins.
Citace podle Chicago (17th ed.)Northern, Jerry L., a Marion P. Downs. Hearing in Children. 4th edition. Baltimore: Williams & Wilkins, 1991.
Citace podle MLA (9th ed.)Northern, Jerry L., a Marion P. Downs. Hearing in Children. 4th edition. Williams & Wilkins, 1991.
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