4. In-text citation, eg:
The following is an important maxim in biology: “One general law,
leading to the advancement of all organic beings, namely, multiply,
vary, let the strongest live and the weakest die.” (Darwin, 1859) But it is
a maxim that is often misunderstood.
Works cited entry, eg:
Darwin, Charles. 1859. The Origin of Species. London: Castle Books