Citazione Stile APA (7a Edizione)

Recknagel, A. B., & Spring, S. N. (1929). Forestry: A study of its origin, application and significance in the United States. A. A. Knopf.

Citazione stile Chigago Style (17a edizione)

Recknagel, Arthur Bernhard, e Samuel N. Spring. Forestry: A Study of Its Origin, Application and Significance in the United States. New York,: A. A. Knopf, 1929.

Citatione MLA (8a ed.)

Recknagel, Arthur Bernhard, e Samuel N. Spring. Forestry: A Study of Its Origin, Application and Significance in the United States. A. A. Knopf, 1929.