Librero, F. (1982). Instructional communication principles. Department of Development Communication, University of the Philippines at Los Banos.
Chicago-viite (17. p.)Librero, Felix. Instructional Communication Principles. Los Banos, Laguna: Department of Development Communication, University of the Philippines at Los Banos, 1982.
MLA-viite (9. p.)Librero, Felix. Instructional Communication Principles. Department of Development Communication, University of the Philippines at Los Banos, 1982.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.