APA引文

Verbrugge, L., Chan, A., & SOCIOLOGY. (2011). Giving help in return: Family reciprocity by older Singaporeans.

Chicago Style Citation

Verbrugge, L.M., A. Chan, and SOCIOLOGY. Giving Help in Return: Family Reciprocity By Older Singaporeans. 2011.

MLA引文

Verbrugge, L.M., A. Chan, and SOCIOLOGY. Giving Help in Return: Family Reciprocity By Older Singaporeans. 2011.

警告：這些引文格式不一定是100％准確.