Silva & Bernd. (1994). Kuasa jualan: Kaedah-kaedah minda Silva bagi jurujual profesional. Golden Books Centre.
Chicago Style (17th ed.) CitationSilva and Bernd. Kuasa Jualan: Kaedah-kaedah Minda Silva Bagi Jurujual Profesional. Kuala Lumpur: Golden Books Centre, 1994.
MLA (8th ed.) CitationSilva and Bernd. Kuasa Jualan: Kaedah-kaedah Minda Silva Bagi Jurujual Profesional. Golden Books Centre, 1994.
Warning: These citations may not always be 100% accurate.