APA (7th ed.) Citation

Gulick, L. H. (1911). The efficient life . Doubleday, Page.

Chicago Style (17th ed.) Citation

Gulick, Luther Halsey. The Efficient Life . Garden City, New York: Doubleday, Page, 1911.

MLA (8th ed.) Citation

Gulick, Luther Halsey. The Efficient Life . Doubleday, Page, 1911.

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