APA (7 ম সংস্করণ) উদ্ধৃতি

Spisani, F. (1990). The new directed numbers. Centro Superiore di Logica e Scienze Comparate.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Spisani, Franco. The New Directed Numbers. Bolonia: Centro Superiore di Logica e Scienze Comparate, 1990.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Spisani, Franco. The New Directed Numbers. Centro Superiore di Logica e Scienze Comparate, 1990.