APA (7th ed.) Citation

Matthews, F. R. (1991). Our world: Over 2000 questions and answers about how it works. Reed Books.

Chicago Style (17th ed.) Citation

Matthews, Frances Russell. Our World: Over 2000 Questions and Answers About How It Works. New South Wales: Reed Books, 1991.

MLA (9th ed.) Citation

Matthews, Frances Russell. Our World: Over 2000 Questions and Answers About How It Works. Reed Books, 1991.

Warning: These citations may not always be 100% accurate.