APA
Huxley J., Malthus T. & Osborn F. (1960). On population. New York (USA): A Mentor Book.
Chicago
Huxley J, Malthus T and Osborn F. 1960. On population. New York (USA): A Mentor Book.
Harvard
Huxley J., Malthus T. and Osborn F. (1960). On population. New York (USA): A Mentor Book.
MLA
Huxley J, Malthus T and Osborn F. On population. New York (USA): A Mentor Book. 1960.