Matter, J. A. (1974). Love, altruism, and world crisis: The challenge of pitirim sorokin. Nelson.
Lua i Stíl Chicago (17ú heag.)Matter, Joseph A. Love, Altruism, and World Crisis: The Challenge of Pitirim Sorokin. Chicago: Nelson, 1974.
Lua MLA (9ú heag.)Matter, Joseph A. Love, Altruism, and World Crisis: The Challenge of Pitirim Sorokin. Nelson, 1974.
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