Cita APA

Merzbach, U. C. 1., & Scheutz, G. 1. (1977). Georg Scheutz and the first printing calculator. Washington: Smithsonian Institution Press.

Citación estilo Chicago

Merzbach, Uta C. 1933-, y George 1785-1873 Scheutz. Georg Scheutz and the First Printing Calculator. Washington: Smithsonian Institution Press, 1977.

Cita MLA

Merzbach, Uta C. 1933-, y George 1785-1873 Scheutz. Georg Scheutz and the First Printing Calculator. Washington: Smithsonian Institution Press, 1977.