Petersen, Æ., Petersen, A., & Perrins, C. (1981). Breeding biology and feeding ecology of Black guillemots.
Chicagoスタイル(17版)引用形式Petersen, Æ, Aevar Petersen, , C. Perrins. Breeding Biology and Feeding Ecology of Black Guillemots. 1981.
MLA(9版)引用形式Petersen, Æ, et al. Breeding Biology and Feeding Ecology of Black Guillemots. 1981.
警告: この引用は必ずしも正確ではありません.