Spisani, F. General theory of directed numbers: With introduction of multiplying and dividing numbers ; testo bilingue = Teoria generale dei numeri relativi. Internat. Logic Review.
Chicago-Zitierstil (17. Ausg.)Spisani, Franco. General Theory of Directed Numbers: With Introduction of Multiplying and Dividing Numbers ; Testo Bilingue = Teoria Generale Dei Numeri Relativi. Bologna: Internat. Logic Review.
MLA-Zitierstil (9. Ausg.)Spisani, Franco. General Theory of Directed Numbers: With Introduction of Multiplying and Dividing Numbers ; Testo Bilingue = Teoria Generale Dei Numeri Relativi. Internat. Logic Review.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.