Robinson, D. S. (1930). The Principles of Reasoning: An introduction to logic and scientific method by Daniel Sommer Robinson (2. edition.). D. Appleton & Company.
Chicago-Zitierstil (17. Ausg.)Robinson, Daniel Sommer. The Principles of Reasoning: An Introduction to Logic and Scientific Method by Daniel Sommer Robinson. 2. edition. New York, London: D. Appleton & Company, 1930.
MLA-Zitierstil (9. Ausg.)Robinson, Daniel Sommer. The Principles of Reasoning: An Introduction to Logic and Scientific Method by Daniel Sommer Robinson. 2. edition. D. Appleton & Company, 1930.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.