Barnes, B. V. (1967). Indications of possible mid-cenozoic hybridization in the aspens of the Columbia Plateau. Zenodo.
Citazione stile Chigago Style (17a edizione)Barnes, Burton V. Indications of Possible Mid-cenozoic Hybridization in the Aspens of the Columbia Plateau. Zenodo, 1967.
Citatione MLA (9a ed.)Barnes, Burton V. Indications of Possible Mid-cenozoic Hybridization in the Aspens of the Columbia Plateau. Zenodo, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.