ERIC Clearinghouse for Science, Mathematics, and Environmental Education, ERIC Information Analysis Center for Science, Mathematics, and Environmental Education, School Mathematics Study Group, & Ohio State University. Center for Science and Mathematics Education. (1969). Investigations in mathematics education. Leland Stanford Junior University.
Chicago-viite (17. p.)ERIC Clearinghouse for Science, Mathematics, and Environmental Education, Mathematics ERIC Information Analysis Center for Science, School Mathematics Study Group, ja Ohio State University. Center for Science and Mathematics Education. Investigations in Mathematics Education. [Palo Alto?]: Leland Stanford Junior University, 1969.
MLA-viite (8. p.)ERIC Clearinghouse for Science, Mathematics, and Environmental Education, et al. Investigations in Mathematics Education. Leland Stanford Junior University, 1969.