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.