Cita APA (7th ed.)
Hesse, H., Finzi Vita, V., & Ricci, F. (1993). Klein e Wagner. Tascabili Economici Newton.
Cita Chicago (17th ed.)
Hesse, Hermann, Viviana Finzi Vita, i Francesca Ricci. Klein E Wagner. Roma: Tascabili Economici Newton, 1993.
Cita MLA (9th ed.)
Hesse, Hermann, et al. Klein E Wagner. Tascabili Economici Newton, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.