-. Britannica Learning Library: Technology and Inventions. Encyclopaedia Britannica, Inc.
Chicago Style (17th ed.) Citation-. Britannica Learning Library: Technology and Inventions. Encyclopaedia Britannica, Inc.
MLA (8th ed.) Citation-. Britannica Learning Library: Technology and Inventions. Encyclopaedia Britannica, Inc.
Warning: These citations may not always be 100% accurate.