Citazione Stile APA (7a Edizione)

Judkins, C. J. (1942). Trade and professional associations of the United States. U.S. Govt. Print. Off.

Citazione stile Chigago Style (17a edizione)

Judkins, Calvert Jay. Trade and Professional Associations of the United States. Washington: U.S. Govt. Print. Off, 1942.

Citatione MLA (9a ed.)

Judkins, Calvert Jay. Trade and Professional Associations of the United States. U.S. Govt. Print. Off, 1942.