Gaya APA

Alexander Graham Bell : inventor and visionary. (2003). New York: [s.n.].

Gaya Chicago

Alexander Graham Bell : inventor and visionary. Cet.1. New York: [s.n.], 2003. Text.

Gaya MLA

Alexander Graham Bell : inventor and visionary. Cet.1. New York: [s.n.], 2003. Text.

Gaya Turabian

Alexander Graham Bell : inventor and visionary. New York: [s.n.], 2003. Print.