WORLD BOOK. (1990). WORLD BOOK'S SCIENCE DESK REFERENCE. WORLD BOOK INC.
芝加哥风格引文WORLD BOOK. WORLD BOOK'S SCIENCE DESK REFERENCE. CHICAGO: WORLD BOOK INC, 1990.
MLA引文WORLD BOOK. WORLD BOOK'S SCIENCE DESK REFERENCE. WORLD BOOK INC, 1990.
警告：这些引文格式不一定是100％准确.