APA (7th ed.) Citation

Cobb, W. F. (1925). Chalk talks on health and safety. The Macmillan company.

Chicago Style (17th ed.) Citation

Cobb, Walter Frank. Chalk Talks on Health and Safety. New York: The Macmillan company, 1925.

MLA (9th ed.) Citation

Cobb, Walter Frank. Chalk Talks on Health and Safety. The Macmillan company, 1925.