APA ציטוט

Spellergerg, I. F., & Pritchard, A. J. (1984). Ecology, ecosystems, management and biology teaching. Division of Science, Technical and Vocational Education, UNESCO.

Chicago Style (17th ed.) Citation

Spellergerg, Ian F., and Alan J. Pritchard. Ecology, Ecosystems, Management and Biology Teaching. Paris: Division of Science, Technical and Vocational Education, UNESCO, 1984.

ציטוט MLA

Spellergerg, Ian F., and Alan J. Pritchard. Ecology, Ecosystems, Management and Biology Teaching. Division of Science, Technical and Vocational Education, UNESCO, 1984.