APA (7th ed.) Citation

Hammock, R. C., & Owings, R. S. (1955). Supervising instruction in secondary schools. McGraw-Hill.

Chicago Style (17th ed.) Citation

Hammock, Robert C., and Ralph S. Owings. Supervising Instruction in Secondary Schools. New York: McGraw-Hill, 1955.

MLA (9th ed.) Citation

Hammock, Robert C., and Ralph S. Owings. Supervising Instruction in Secondary Schools. McGraw-Hill, 1955.