Παραπομπή APA

Gould, S. J. (1991). Ever since Darwin: Reflection in natural history. Penguin Books.

Παραπομπή Chicago Style

Gould, Stephen Jay. Ever Since Darwin: Reflection in Natural History. Penguin Books, 1991.

Παραπομπή MLA

Gould, Stephen Jay. Ever Since Darwin: Reflection in Natural History. Penguin Books, 1991.