Schmieder, F. (2011). On the beginnings and early discussions of the metaphor 'Survival of the Fittest': Falko Schmieder. Contributions to the history of concepts.
Chicago-referens (17:e uppl.)Schmieder, Falko. "On the Beginnings and Early Discussions of the Metaphor 'Survival of the Fittest': Falko Schmieder." Contributions to the History of Concepts 2011.
MLA-referens (8:e uppl.)Schmieder, Falko. "On the Beginnings and Early Discussions of the Metaphor 'Survival of the Fittest': Falko Schmieder." Contributions to the History of Concepts, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.