Citazione Stile APA (7a Edizione)

Harrison, N. (1991). How to design effective text-based open learning: A modular course. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Harrison, Nigel. How to Design Effective Text-based Open Learning: A Modular Course. London: McGraw-Hill, 1991.

Citatione MLA (9a ed.)

Harrison, Nigel. How to Design Effective Text-based Open Learning: A Modular Course. McGraw-Hill, 1991.