APA
Jr. of educational technology system Vol.19 No 1-4 Mar 1991, . (1991). Jr. of educational technology system Vol.19 No 1-4 Mar 1991. New York: Baywood publishing company,Inc.
Chicago
Jr. of educational technology system Vol.19 No 1-4 Mar 1991, . 1991. Jr. of educational technology system Vol.19 No 1-4 Mar 1991. New York: Baywood publishing company,Inc.
Harvard
Jr. of educational technology system Vol.19 No 1-4 Mar 1991, . (1991). Jr. of educational technology system Vol.19 No 1-4 Mar 1991. New York: Baywood publishing company,Inc.
MLA
Jr. of educational technology system Vol.19 No 1-4 Mar 1991, . Jr. of educational technology system Vol.19 No 1-4 Mar 1991. New York: Baywood publishing company,Inc. 1991.