Gaya APA

Russel, J, D., , . (). **Modular instruction A guide to the design, seletion, utilization and ì evaluation of modular material . Minnepolis:: .

Gaya MLA

Russel, James, D., , . "**Modular instruction A guide to the design, seletion, utilization and ì evaluation of modular material". Minnepolis:: , . Text.