Shapiro, E. S., & Clemens, N. H. (2023). Academic Skills Problems (quinta edición.). The Guilford Press.
Lua i Stíl Chicago (17ú heag.)Shapiro, Edward S., agus Nathan H. Clemens. Academic Skills Problems. quinta edición. New York: The Guilford Press, 2023.
Lua MLA (9ú heag.)Shapiro, Edward S., agus Nathan H. Clemens. Academic Skills Problems. quinta edición. The Guilford Press, 2023.
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