Gómez, V. (2013). Birthspacing and fertility decline in Costa Rica.
Citación estilo ChicagoGómez, Víctor. Birthspacing and Fertility Decline in Costa Rica. 2013.
MLA引文Gómez, Víctor. Birthspacing and Fertility Decline in Costa Rica. 2013.
警告：这些引文格式不一定是100％准确.