APA (7th ed.) Citation

Billett, R. O. (1940). Fundamentals of secondary-school teaching with emphasis on the unit method. Houghton Mifflin company.

Chicago Style (17th ed.) Citation

Billett, Roy Oren. Fundamentals of Secondary-school Teaching with Emphasis on the Unit Method. Boston, New York [etc.]: Houghton Mifflin company, 1940.

MLA (9th ed.) Citation

Billett, Roy Oren. Fundamentals of Secondary-school Teaching with Emphasis on the Unit Method. Houghton Mifflin company, 1940.

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