APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.