Smith, A. (2002). Homocysteine, B vitamins, and cognitive deficit in the elderly.
芝加哥风格引文Smith, A. Homocysteine, B Vitamins, and Cognitive Deficit in the Elderly. 2002.
MLA引文Smith, A. Homocysteine, B Vitamins, and Cognitive Deficit in the Elderly. 2002.
警告：这些引文格式不一定是100％准确.