APA (7th ed.) Citation

Fehr, H. F. (1955). Arithmetic at work: Book I. D.C. Heath.

Chicago Style (17th ed.) Citation

Fehr, Howard F. Arithmetic at Work: Book I. Boston: D.C. Heath, 1955.

MLA (9th ed.) Citation

Fehr, Howard F. Arithmetic at Work: Book I. D.C. Heath, 1955.

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