APA引文

León, P. (1997). Biosecurity in the use of genetically modified crops.

Citación estilo Chicago

León, Pedro. Biosecurity in the Use of Genetically Modified Crops. 1997.

MLA引文

León, Pedro. Biosecurity in the Use of Genetically Modified Crops. 1997.

警告：這些引文格式不一定是100％准確.