Cita APA (7a ed.)

Gould, S. J. (1990). The panda's thumb: More reflections in natural history. Penguin.

Cita Chicago Style (17a ed.)

Gould, Stephen Jay. The Panda's Thumb: More Reflections in Natural History. London [etc.]: Penguin, 1990.

Cita MLA (9a ed.)

Gould, Stephen Jay. The Panda's Thumb: More Reflections in Natural History. Penguin, 1990.