Citazione APA

Elson, H. W., & MacMullan, C. E. (1915). The story of the Old world. World Book Co..

Stile di citazione Chicago

Elson, Henry W., e Cornelia E. MacMullan. The Story of the Old World. Yonkers-on-Hudson: World Book Co., 1915.

Citazione MLA

Elson, Henry W., e Cornelia E. MacMullan. The Story of the Old World. World Book Co., 1915.