Cita APA (7a ed.)

Johanson, D. C., & Edey, M. A. (1990). Lucy: The beginnings of humankind. Penguin Books.

Cita Chicago Style (17a ed.)

Johanson, Donald C., y Maitland Amstrong Edey. Lucy: The Beginnings of Humankind. London: Penguin Books, 1990.

Cita MLA (9a ed.)

Johanson, Donald C., y Maitland Amstrong Edey. Lucy: The Beginnings of Humankind. Penguin Books, 1990.