APA (7th ed.) Citation

Ehret, W. F. (1942). Physical science. The Macmillan company.

Chicago Style (17th ed.) Citation

Ehret, William Frederick. Physical Science. New York: The Macmillan company, 1942.

MLA (9th ed.) Citation

Ehret, William Frederick. Physical Science. The Macmillan company, 1942.

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