Gaya APA
Hagen, S, A.
(2000).
Sound Advice – a basis for listening
(
Ed. 2)
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USA:
Pearson longman.
Gaya MLA
Hagen, Stacy, A.
"Sound Advice – a basis for listening".
Ed. 2
USA:
Pearson longman,
2000.
Umum.