APA-čujuhus (7. p.)
CASTLE, D. (1994). TELEPHONE STRATEGIES. A TECHNICAL AND PRACTICAL GUIDE FOR HARD-OF-HEARING PEOPLE. SELF HELP FOR HARD OF HEARING PEOPLE,INC.
Chicago-čujuhus (17. p.)
CASTLE, D.L. TELEPHONE STRATEGIES. A TECHNICAL AND PRACTICAL GUIDE FOR HARD-OF-HEARING PEOPLE. BETHESDA: SELF HELP FOR HARD OF HEARING PEOPLE,INC, 1994.
MLA-čujuhus (9. p.)
CASTLE, D.L. TELEPHONE STRATEGIES. A TECHNICAL AND PRACTICAL GUIDE FOR HARD-OF-HEARING PEOPLE. SELF HELP FOR HARD OF HEARING PEOPLE,INC, 1994.
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