MEYERS, L. S., & GROSSEN, N. S. (1974). Behavioral research: Theory, procedure, and design. W.H. Freeman and Company.
Lua i Stíl Chicago (17ú heag.)MEYERS, Lawrence S., agus Neal S. GROSSEN. Behavioral Research: Theory, Procedure, and Design. San Fancisco: W.H. Freeman and Company, 1974.
Lua MLA (9ú heag.)MEYERS, Lawrence S., agus Neal S. GROSSEN. Behavioral Research: Theory, Procedure, and Design. W.H. Freeman and Company, 1974.
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