APA-viite (7. p.)

Instructional Objectives Exchange. (1972). Math: Data relationships : graphs, ratios and proportions, statistics and probability, grades K-9 (Rev. ed.).

Chicago-viite (17. p.)

Instructional Objectives Exchange. Math: Data Relationships : Graphs, Ratios and Proportions, Statistics and Probability, Grades K-9. Rev. ed. Los Angeles, Calif, 1972.

MLA-viite (8. p.)

Instructional Objectives Exchange. Math: Data Relationships : Graphs, Ratios and Proportions, Statistics and Probability, Grades K-9. Rev. ed. 1972.