APA-ийн эшлэл(7 дахь хэвлэлт)

Keddy, C. J., Keddy, P. A., & Planck, R. J. (1983). An ecological study of Cypripedium passerinum Rich. (Sparrow's Egg Lady-shpper, Orchidaceae) on the north shore of Lake Superior. Zenodo.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Keddy, Cathy J., Paul A. Keddy, ба R. J. Planck. An Ecological Study of Cypripedium Passerinum Rich. (Sparrow's Egg Lady-shpper, Orchidaceae) on the North Shore of Lake Superior. Zenodo, 1983.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Keddy, Cathy J., et al. An Ecological Study of Cypripedium Passerinum Rich. (Sparrow's Egg Lady-shpper, Orchidaceae) on the North Shore of Lake Superior. Zenodo, 1983.