The identification of Berberis aquifolium and Berberis repens

MLA

Piper, Charles V. The Identification of Berberis Aquifolium and Berberis Repens. Washington: Govt. print. off., 1922.

APA

Piper, C. V. (1922). The identification of Berberis aquifolium and Berberis repens. Washington: Govt. print. off.

Chicago

Piper, Charles V. The Identification of Berberis Aquifolium and Berberis Repens. Washington: Govt. print. off., 1922.