Petersen, Æ., Petersen, A., & Perrins, C. (1981). Breeding biology and feeding ecology of Black guillemots.
芝加哥风格引文Petersen, Æ, Aevar Petersen, 与 C. Perrins. Breeding Biology and Feeding Ecology of Black Guillemots. 1981.
MLA引文Petersen, Æ, et al. Breeding Biology and Feeding Ecology of Black Guillemots. 1981.
警告：这些引文格式不一定是100％准确.