Citazione Stile APA (7a Edizione)

Landis, P. H. (1948). Population problems: A cultural interpretation. American Book Company.

Citazione stile Chigago Style (17a edizione)

Landis, Paul Henry. Population Problems: A Cultural Interpretation. New York: American Book Company, 1948.

Citatione MLA (9a ed.)

Landis, Paul Henry. Population Problems: A Cultural Interpretation. American Book Company, 1948.