Citazione Stile APA (7a Edizione)

Callihan, T. W. (1927). A brief course in the selling of life insurance. Prentice-Hall, inc.

Citazione stile Chigago Style (17a edizione)

Callihan, Tressler W. A Brief Course in the Selling of Life Insurance. New York: Prentice-Hall, inc, 1927.

Citatione MLA (9a ed.)

Callihan, Tressler W. A Brief Course in the Selling of Life Insurance. Prentice-Hall, inc, 1927.