APA引文

Readers Digest Asso. (1980). Natural wonders of the world. RDA.

Chicago Style (17th ed.) Citation

Readers Digest Asso. Natural Wonders of the World. New York: RDA, 1980.

MLA引文

Readers Digest Asso. Natural Wonders of the World. RDA, 1980.

警告：這些引文格式不一定是100％准確.