Examples and Counterexamples | Elsevier. Cambridge University Press.
Chicago Style (17th ed.) ZitazioaExamples and Counterexamples | Elsevier. Cambridge University Press.
MLA (9th ed.) ZitazioaExamples and Counterexamples | Elsevier. Cambridge University Press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.