APA Style
The origin of species : by means of natural selection. (1985).
London:
Penguin Book.
Chicago Style
The origin of species : by means of natural selection.
.
London:
Penguin Book,
1985.
Book.
MLA Style
The origin of species : by means of natural selection.
.
London:
Penguin Book,
1985.
Book.
Turabian Style
The origin of species : by means of natural selection.
London:
Penguin Book,
1985.
Book.