APA (7th ed.) Citation

Preston, S. H. (1990). World population: Approaching the year 2000 (1. print.). Sage.

Chicago Style (17th ed.) Citation

Preston, Samuel H. World Population: Approaching the Year 2000. 1. print. Newbury Park, Calif. <<[u.a.]>>: Sage, 1990.

MLA (9th ed.) Citation

Preston, Samuel H. World Population: Approaching the Year 2000. 1. print. Sage, 1990.