Cita APA (7a ed.)
Kelman, H. C. (1968). A time to speak: On human values and social research.
Cita estilo Chicago (17a ed.)
Kelman, Herbert C. A Time to Speak: On Human Values and Social Research. 1968.
Cita MLA (9a ed.)
Kelman, Herbert C. A Time to Speak: On Human Values and Social Research. 1968.
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