APA (7th ed.) Citation

Lopez, A. (1961). Problems in stable population theory. Office of Population Research, Princeton University.

Chicago Style (17th ed.) Citation

Lopez, Alvaro. Problems in Stable Population Theory. Princeton: Office of Population Research, Princeton University, 1961.

MLA (9th ed.) Citation

Lopez, Alvaro. Problems in Stable Population Theory. Office of Population Research, Princeton University, 1961.