books.google.hu - Since the first edition of this landmark book was published in 1962, Everett Rogers's name has become "virtually synonymous with the study of diffusion of innovations," according to Choice. The second and third editions of Diffusion of Innovations became the standard textbook and reference on diffusion...https://books.google.hu/books/about/Diffusion_of_Innovations_4th_Edition.html?hl=hu&id=v1ii4QsB7jIC&q=opinion+leadership&utm_source=gb-gplus-shareDiffusion of Innovations, 4th Edition
