Spellergerg, I. F., & Pritchard, A. J. (1984). Ecology, ecosystems, management and biology teaching. Division of Science, Technical and Vocational Education, UNESCO.
Citazione stile Chigago Style (17a edizione)Spellergerg, Ian F., e Alan J. Pritchard. Ecology, Ecosystems, Management and Biology Teaching. Paris: Division of Science, Technical and Vocational Education, UNESCO, 1984.
Citatione MLA (9a ed.)Spellergerg, Ian F., e Alan J. Pritchard. Ecology, Ecosystems, Management and Biology Teaching. Division of Science, Technical and Vocational Education, UNESCO, 1984.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.