Tracy, B. (2002). BE A SALES SUPERSTAR: 21 GREAT WAYS TO SELL MORE FASTER, EASIER IN TOUGH MARKETS. Mumbai, India : Magna Publishing Co. Ltd..
Lua i Stíl Chicago (17ú heag.)Tracy, Brian. BE A SALES SUPERSTAR: 21 GREAT WAYS TO SELL MORE FASTER, EASIER IN TOUGH MARKETS. Mumbai, India : Magna Publishing Co. Ltd., 2002.
Lua MLA (9ú heag.)Tracy, Brian. BE A SALES SUPERSTAR: 21 GREAT WAYS TO SELL MORE FASTER, EASIER IN TOUGH MARKETS. Mumbai, India : Magna Publishing Co. Ltd., 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.