APA-viite (7. p.)

van Hoorn, W., & Keilmann, N. (1997). Birth expectations and their use in fertility forecasting.

Chicago-viite (17. p.)

van Hoorn, Wim, ja Nico Keilmann. Birth Expectations and Their Use in Fertility Forecasting. Luxembourg, 1997.

MLA-viite (8. p.)

van Hoorn, Wim, ja Nico Keilmann. Birth Expectations and Their Use in Fertility Forecasting. 1997.