▁Opera . ▁ ▁William ▁Hans on , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁E ti qu ette . ▁ ▁André ▁La un ay , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Anti ques . ▁Peter ▁Clay ton , ▁co - author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Jazz . ▁Ross ▁Le ck ie , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁the ▁Class ics . ▁ ▁Thomas ▁V . ▁Morris , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Philosoph y . ▁Michael ▁Ton er , ▁author ▁of ▁The ▁Bl uffer ’ s ▁Guide ▁to ▁the ▁EU . ▁Bor is ▁Star ling , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Bre x it . ▁Jonathan ▁Good all , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Be er . ▁Sus ie ▁Bon if ace , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Journal ism . ▁Keith ▁Hann , ▁author ▁of ▁The ▁Bl uffer ' s ▁Guide ▁to ▁Opera . ▁ ▁References ▁ ▁External ▁links ▁ ▁Bl uff ers . com ▁BBC ▁interview ▁with ▁William ▁Hans on , ▁Bl uffer ’ s ▁Guide ▁to ▁E ti qu ette ▁BBC ▁interview ▁with ▁William ▁Hans on , ▁Bl uffer ’ s ▁Guide ▁to ▁E ti qu ette ▁Article ▁in ▁the ▁Daily ▁Mir ror ▁newspaper ▁by ▁William ▁Hans on , ▁Bl uffer ’ s ▁Guide ▁to ▁E ti qu ette ▁Article ▁in ▁the ▁Daily ▁Mir ror ▁newspaper ▁by ▁William ▁Hans on ,