Citazione Stile APA (7a Edizione)

Patty, W. W. 1. (1940). Teaching health and safety in elementary grades. Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Patty, Willard Walter 1892. Teaching Health and Safety in Elementary Grades. New York: Prentice-Hall, 1940.

Citatione MLA (9a ed.)

Patty, Willard Walter 1892. Teaching Health and Safety in Elementary Grades. Prentice-Hall, 1940.