Style de citation APA

Ploetz, C., Tillinghast, W. H., & Barnes, H. E. (1925). Ploetz' epitome of history. Blue ribbon Books.

Style de citation Chicago

Ploetz, Carl, William H. Tillinghast, et Harry Elmer Barnes. Ploetz' Epitome of History. New York: Blue ribbon Books, 1925.

Style de citation MLA

Ploetz, Carl, et al. Ploetz' Epitome of History. Blue ribbon Books, 1925.