APA استشهاد

Nelson,C Gerald. (2001). Genetically modified organisams in agriculture economics and politics. Academic press.

استشهاد بنمط شيكاغو

Nelson,C Gerald. Genetically Modified Organisams in Agriculture Economics and Politics. San Diego: Academic press, 2001.

MLA استشهاد

Nelson,C Gerald. Genetically Modified Organisams in Agriculture Economics and Politics. Academic press, 2001.