Cita APA (7th ed.)

Freedman, D. S., & Mueller, E. (1974). Economic modules for use in fertility surveys in less developed countries. International Statistical Institute ; World Fertility Survey.

Cita Chicago (17th ed.)

Freedman, Deborah S., i Eva Mueller. Economic Modules for Use in Fertility Surveys in Less Developed Countries. [Voorburg : London: International Statistical Institute ; World Fertility Survey, 1974.

Cita MLA (8th ed.)

Freedman, Deborah S., i Eva Mueller. Economic Modules for Use in Fertility Surveys in Less Developed Countries. International Statistical Institute ; World Fertility Survey, 1974.