Gaya APA

Leakey, R, E, &, L, R. (1982). Origins: What new discoveries reveal about the emergence of our species and its possible future. . New York: New York EP Dutton.

Gaya MLA

Leakey, Richard, E., &, Lewin,, Roger. "Origins: What new discoveries reveal about the emergence of our species and its possible future. ". New York: New York EP Dutton, 1982. Buku.