Cita APA (7a ed.)
Leakey, R. E. The Origin of humankind. Basic Books.
Cita estilo Chicago (17a ed.)
Leakey, Richard E. The Origin of Humankind. Nueva York, EUA: Basic Books.
Cita MLA (9a ed.)
Leakey, Richard E. The Origin of Humankind. Basic Books.
警告：這些引文格式不一定是100％准確.