Asimov, I. (1989). Frontiers: New discoveries about man and his planet, outer space, and the universe. Truman Talley Books/Plume.
Chicago-стиль цитированияAsimov, Isaac. Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe. New York: Truman Talley Books/Plume, 1989.
MLA-цитированиеAsimov, Isaac. Frontiers: New Discoveries About Man and His Planet, Outer Space, and the Universe. Truman Talley Books/Plume, 1989.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.