Claude C. Hopkins / Claude CHopkins
Librería Samer Atenea
Librería Aciertas (Toledo)
Kálamo Books
Librería Perelló (Valencia)
Librería Elías (Asturias)
Donde los libros
Librería Kolima (Madrid)
Librería Proteo (Málaga)
Gain a lifetime of experience from the inventor of test marketing and coupon sampling -- Claude C. Hopkins. Discover his fixed principles and basic fundamentals that still prevail today.