Hannon, Peggy, Karl E. Umble, Lorraine Alexander, Don Francisco, Allan Steckler, Gail Tudor, and Vaugn Upshaw. 2002. “Gagne’s and Laurillard’s Models of Instruction Applied to Distance Education: A Theoretically Driven Evaluation of an Online Curriculum in Public Health”. The International Review of Research in Open and Distributed Learning 3 (2). https://doi.org/10.19173/irrodl.v3i2.105.