APA-viite (7. p.)
Texas Education Agency & Texas Education Agency. (1978). Preferred signs: For instructional purposes. Texas Education Agency..
Chicago-viite (17. p.)
Texas Education Agency ja Texas Education Agency. Preferred Signs: For Instructional Purposes. Texas, U.S.A.: Texas Education Agency., 1978.
MLA-viite (9. p.)
Texas Education Agency ja Texas Education Agency. Preferred Signs: For Instructional Purposes. Texas Education Agency., 1978.
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