Gaya APA

Incorporated, G. (1984). The Encyclopedia Americana : International Edition Volume 3 B To Birling (Ed.1). Danbury: Grolier Incorporated.

Gaya MLA

Incorporated, Grolier. "The Encyclopedia Americana : International Edition Volume 3 B To Birling". Ed.1 Danbury: Grolier Incorporated, 1984. Buku UN.