APA
Williams P. A., Nicol E. & Newfield M. (2000). Assessing the risk to indigenous New Zealand biota from new exotic plant taxa and genetic material. Wellington, Nueva Zelanda: Department of Conservation.
Chicago
Williams Peter A, Nicol Euan and Newfield Melanie. 2000. Assessing the risk to indigenous New Zealand biota from new exotic plant taxa and genetic material. Wellington, Nueva Zelanda: Department of Conservation.
Harvard
Williams P. A., Nicol E. and Newfield M. (2000). Assessing the risk to indigenous New Zealand biota from new exotic plant taxa and genetic material. Wellington, Nueva Zelanda: Department of Conservation.
MLA
Williams Peter A, Nicol Euan and Newfield Melanie. Assessing the risk to indigenous New Zealand biota from new exotic plant taxa and genetic material. Wellington, Nueva Zelanda: Department of Conservation. 2000.