It features in all my books and I know Paul Smith, who created it well - he's my co-author on Emarketing Excellence.
ມັນມີຄຸນສົມບັດໃນປື້ມທັງຫມົດຂອງຂ້ອຍແລະຂ້ອຍຮູ້ວ່າ Paul Smith, ຜູ້ທີ່ສ້າງມັນດີ - ລາວເປັນຜູ້ຮ່ວມມືຂອງຂ້ອຍກ່ຽວກັບ Emarketing Excellence.