APA Citatie

Asimov, I. (1989). Frontiers: New discoveries about man and his planet, outer space, and the universe. Truman Talley Books/Plume.

Chicago Style citaat

Asimov, Isaac. Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe. New York: Truman Talley Books/Plume, 1989.

MLA citatie

Asimov, Isaac. Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe. Truman Talley Books/Plume, 1989.