APA(7版)引用形式

Betts, E. A., Esterer, L. A., & Betts, E. A. (1947). Directed spelling activities. American Book Co..

Chicagoスタイル(17版)引用形式

Betts, Emmett A., Louise A. Esterer, , Emmett Albert Betts. Directed Spelling Activities. [New York ; Cincinnati]: American Book Co., 1947.

MLA(8版)引用形式

Betts, Emmett A., et al. Directed Spelling Activities. American Book Co., 1947.