LeapFrog Productions, inc, & United States. Bureau of Land Management. (2001). The vanishing shrub-steppe. Bureau of Land Management.
Style de citation Chicago (17e éd.)LeapFrog Productions, inc, et United States. Bureau of Land Management. The Vanishing Shrub-steppe. Wenatchee, WA: Bureau of Land Management, 2001.
Style de citation MLA (8e éd.)LeapFrog Productions, inc, et United States. Bureau of Land Management. The Vanishing Shrub-steppe. Bureau of Land Management, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.