Gaya APA

Incorporated, G. (1983). Encyclopedia Americana Volume 29 : Wilmot Proviso to Zygote . Amerika: Grolier Incorporated, Inc..

Gaya MLA

Incorporated, Grolier. "Encyclopedia Americana Volume 29 : Wilmot Proviso to Zygote". Amerika: Grolier Incorporated, Inc., 1983. Text.