Ridley, M., & Grafen, A. (1981). ARE GREEN BEARD GENES OUTLAWS.
芝加哥风格引文Ridley, M., 与 A. Grafen. ARE GREEN BEARD GENES OUTLAWS. 1981.
MLA引文Ridley, M., 与 A. Grafen. ARE GREEN BEARD GENES OUTLAWS. 1981.
警告：这些引文格式不一定是100％准确.
APA引文