Motes, R. A. Imaginary Numbers and Their Roles in Engineering and Physics. SPIE Digital Library.
Citazione stile Chigago Style (17a edizione)Motes, R. Andrew. Imaginary Numbers and Their Roles in Engineering and Physics. SPIE Digital Library.
Citatione MLA (9a ed.)Motes, R. Andrew. Imaginary Numbers and Their Roles in Engineering and Physics. SPIE Digital Library.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.