Cita APA (7a ed.)
Texas Education Agency & Texas Education Agency. (1978). Preferred signs: For instructional purposes. Texas Education Agency..
Cita Chicago Style (17a ed.)
Texas Education Agency y Texas Education Agency. Preferred Signs: For Instructional Purposes. Texas, U.S.A.: Texas Education Agency., 1978.
Cita MLA (9a ed.)
Texas Education Agency y Texas Education Agency. Preferred Signs: For Instructional Purposes. Texas Education Agency., 1978.
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