Cita APA (7a ed.)

Arnold, F., & Blanc, A. K. (1990). Fertility levels and trends. Institute for Resource Development, Macro Systems, Inc.

Cita Chicago Style (17a ed.)

Arnold, Fred, y Ann K. Blanc. Fertility Levels and Trends. Maryland: Institute for Resource Development, Macro Systems, Inc, 1990.

Cita MLA (9a ed.)

Arnold, Fred, y Ann K. Blanc. Fertility Levels and Trends. Institute for Resource Development, Macro Systems, Inc, 1990.