APA (7th ed.) Citation

Gruenberg, B. C. (1919). Elementary biology: An introduction to the science of life. Ginn and company.

Chicago Style (17th ed.) Citation

Gruenberg, Benjamin C. Elementary Biology: An Introduction to the Science of Life. Boston New York [etc.]: Ginn and company, 1919.

MLA (9th ed.) Citation

Gruenberg, Benjamin C. Elementary Biology: An Introduction to the Science of Life. Ginn and company, 1919.