Hyman, R. (1964). The nature of psychological inquiry. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Hyman, Ray. The Nature of Psychological Inquiry. Englewood Cliffs, N.J.: Prentice-Hall, 1964.
Lua MLA (8ú heag.)Hyman, Ray. The Nature of Psychological Inquiry. Prentice-Hall, 1964.
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