APA (7th ed.) Citation

Ward, C. B. R. (1972). This blue planet: Introduction to physical science. Little, Brown.

Chicago Style (17th ed.) Citation

Ward, Charlotte Berkley Reed. This Blue Planet: Introduction to Physical Science. Boston: Little, Brown, 1972.

MLA (9th ed.) Citation

Ward, Charlotte Berkley Reed. This Blue Planet: Introduction to Physical Science. Little, Brown, 1972.

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