APA (7th ed.) Citation

Leland, O. M. (1921). Practical least squares. [etc.] McGrawa-Hill book company, inc.

Chicago Style (17th ed.) Citation

Leland, Ora Miner. Practical Least Squares. New York: [etc.] McGrawa-Hill book company, inc, 1921.

MLA (8th ed.) Citation

Leland, Ora Miner. Practical Least Squares. [etc.] McGrawa-Hill book company, inc, 1921.