Ward, C. B. R. (1972). This blue planet: Introduction to physical science. Little, Brown.
Chicago Style (17th ed.) CitationWard, Charlotte Berkley Reed. This Blue Planet: Introduction to Physical Science. Boston: Little, Brown, 1972.
MLA (9th ed.) CitationWard, Charlotte Berkley Reed. This Blue Planet: Introduction to Physical Science. Little, Brown, 1972.
Warning: These citations may not always be 100% accurate.