APA (7th ed.) Citation

Gettell, R. G. (1914). Problems in political evolution. Ginn and company.

Chicago Style (17th ed.) Citation

Gettell, Raymond Garfield. Problems in Political Evolution. Boston, New York [etc.]: Ginn and company, 1914.

MLA (9th ed.) Citation

Gettell, Raymond Garfield. Problems in Political Evolution. Ginn and company, 1914.