Texas A&M University. (1988). Costa Rica/Texas A&M University: Collaborative programs in mathematics and its teaching. A&M University.
Čikaški stil citiranja (17. izdanje)Texas A&M University. Costa Rica/Texas A&M University: Collaborative Programs in Mathematics and Its Teaching. Texas, Estados Unidos: A&M University, 1988.
MLA način citiranja (9. izdanje)Texas A&M University. Costa Rica/Texas A&M University: Collaborative Programs in Mathematics and Its Teaching. A&M University, 1988.
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