Guide to the common Potentilla species of the Blue Mountains ecoregion

MLA

Aitken, Marti, Catherine G. Parks and Or.) Pacific Northwest Research Station (Portland. Guide to the common Potentilla species of the Blue Mountains ecoregion. Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2004]

APA

Aitken, M., Parks, C. & Pacific Northwest Research Station (Portland, O. (2004). Guide to the common Potentilla species of the Blue Mountains ecoregion. Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station.

Chicago

Aitken, Marti, Catherine G. Parks and Or.) Pacific Northwest Research Station (Portland. Guide to the common Potentilla species of the Blue Mountains ecoregion. Portland, Or. : U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station, [2004]