• The content of the book is still relevant today. Essentially, Groothuis sought to apply Marshall McLuhan, Jacques Ellul, and Neil Postman's teachings to the early stage of the Internet. About the format and citing the book... The official Turabian guide says that ebooks can be cited via the chapter number and the subheadings. If you're a seminarian, I would encourage you to talk to the leadership and ask if they are willing to consider making this change based on the official Turabian guide.