Our thesis is that communication has several sources. Some may be considered as main sources or constitutive sources from which communication springs, and others may be considered as secondary or complementary sources of communication. We can thus acknowledge eight main sources of communication: rhetoric, persuasion, psychology, sociology, anthropology, semiotics, linguistics and political science. Rhetoric is the first and oldest discipline which studied certain communication phenomena; rhetoric has outlined a proto-object of communication. Sociology is the most powerful source of communication methodology: sociology has supplied most of the theories and methods that have led to the discipline of communication growing autonomously. We assert that secondary sources of communication are: philosophy, ethics, pragmatics, mathematics, cybernetics and ecology. [Florentin Smarandache & Ştefan Vlăduţescu] *** The book has 15 chapters written by the following authors and co-authors from USA, England, China, Poland, Serbia, Bulgaria, Slovakia, and Romania: Florentin Smarandache, Ştefan Vlăduţescu, Jim O’Brien, Svetislav Paunovic, Mariana Man, Zhaoxun Song, Dandan Shan, Maria Nowicka-Skowron, Sorin Mihai Radu, Janusz Grabara, Ioan Cosmescu, Adrian Nicolescu, Krasimira Dimitrova, Alina Țenescu, Sebastian Kot, Beata Ślusarczyk, Maria Măcriș, Iwona Grabara, Piotr Pachura, Mircea Bunaciu, Jozef Novak-Marcincin, Mircea Duică, Odette Arhip, Vlad Roșca, and Vladimir-Aurelian Enăchescu.