Purves, W. K., Sadava, D., Orians, G. H., & Heller, H. C. Life: The science of biology (Seventh edition.).
芝加哥风格引文Purves, William K., David Sadava, Gordon H. Orians, 与 H. Craig Heller. Life: The Science of Biology. Seventh edition.
MLA引文Purves, William K., et al. Life: The Science of Biology. Seventh edition.
警告：这些引文格式不一定是100％准确.