Gaya APA

Geldsetzer, L., Schwartz, R, L. (2013). Logical Thinking in the Pyramidal Schema of Concepts: The Logical and Mathematical Elements . Springer Netherlands: Springer.

Gaya MLA

Geldsetzer, Lutz., Schwartz, Richard, L.. "Logical Thinking in the Pyramidal Schema of Concepts: The Logical and Mathematical Elements". Springer Netherlands: Springer, 2013. E-Book.