APA
Jr. of Educational Tecnology system, . (1990). Jr. of Educational Tecnology system. New York: Baywood publishing company,Inc.
Chicago
Jr. of Educational Tecnology system, . 1990. Jr. of Educational Tecnology system. New York: Baywood publishing company,Inc.
Harvard
Jr. of Educational Tecnology system, . (1990). Jr. of Educational Tecnology system. New York: Baywood publishing company,Inc.
MLA
Jr. of Educational Tecnology system, . Jr. of Educational Tecnology system. New York: Baywood publishing company,Inc. 1990.