Ewins, P., Ewins, P., & Perrins, C. (1986). The ecology of black guillemots Cepphus grylle in Shetland.
芝加哥风格引文Ewins, P., Pete Ewins, 与 C. Perrins. The Ecology of Black Guillemots Cepphus Grylle in Shetland. 1986.
MLA引文Ewins, P., et al. The Ecology of Black Guillemots Cepphus Grylle in Shetland. 1986.
警告：这些引文格式不一定是100％准确.