Alvo, R., & Ponomarenko, S. (2003). Vegetation classification standard for Canada Workshop: 3 1 May - 2 June 2000. Zenodo.
芝加哥风格引文Alvo, Robert, 与 Sergei Ponomarenko. Vegetation Classification Standard for Canada Workshop: 3 1 May - 2 June 2000. Zenodo, 2003.
MLA引文Alvo, Robert, 与 Sergei Ponomarenko. Vegetation Classification Standard for Canada Workshop: 3 1 May - 2 June 2000. Zenodo, 2003.
警告：这些引文格式不一定是100％准确.