Geldsetzer. (2013). Logical Thinking in the Pyramidal Schema of Concepts: The Logical and Mathematical Elements (1.). Springer Netherlands.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रGeldsetzer. Logical Thinking in the Pyramidal Schema of Concepts: The Logical and Mathematical Elements. 1. Springer Netherlands, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रGeldsetzer. Logical Thinking in the Pyramidal Schema of Concepts: The Logical and Mathematical Elements. 1. Springer Netherlands, 2013.
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