APA
Snell J. L., kemeny J. G. & Thompson G. L. (1959). Finite Mathematical structures. Englewood Cliffs: Prentice Hall.
Chicago
Snell J L, kemeny John G and Thompson G L. 1959. Finite Mathematical structures. Englewood Cliffs: Prentice Hall.
Harvard
Snell J. L., kemeny J. G. and Thompson G. L. (1959). Finite Mathematical structures. Englewood Cliffs: Prentice Hall.
MLA
Snell J L, kemeny John G and Thompson G L. Finite Mathematical structures. Englewood Cliffs: Prentice Hall. 1959.