Cassidy, D. (1993). It`s when you sell that counts. Vision Books.
Lua i Stíl Chicago (17ú heag.)Cassidy, Donald. It`s When You Sell That Counts. New Delhi: Vision Books, 1993.
Lua MLA (9ú heag.)Cassidy, Donald. It`s When You Sell That Counts. Vision Books, 1993.
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