In the classic book The 22 Immutable Laws of Marketing, by Al Ries and Jack Trout, Law 7 is "the law of the ladder."
Hadaba, waxaan idiin soo gudbineynaa soo koobidda Buugga 22 Qaanuun ee aasaasiga u ah Suuqgeynta "The 22 Immutable laws of Marketing," waxaa qoray Al Ries & Jack Trout, buugga waxaa la qoray 1993, Goodreads waxay ku qiimeeyeen 4/5 oo ah darajo heersare ah.