Ehrlich, P. R., & Ornstein, R. E. (2010). Humanity on a tightrope: Thoughts on empathy, family, and big changes for a viable future. Rowman & Littlefield : Distributed by National Book Network.
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Chicago Style (17th ed.) Zitazioa
Ehrlich, Paul R., eta Robert E. Ornstein. Humanity on a Tightrope: Thoughts on Empathy, Family, and Big Changes for a Viable Future. Lanham, Md.: Rowman & Littlefield : Distributed by National Book Network, 2010.
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MLA (9th ed.) Zitazioa
Ehrlich, Paul R., eta Robert E. Ornstein. Humanity on a Tightrope: Thoughts on Empathy, Family, and Big Changes for a Viable Future. Rowman & Littlefield : Distributed by National Book Network, 2010.
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